TECH TALK - ask your technical car questions

steelsnake00 · Post by **steelsnake00** » 20 Jun 2006, 19:44

RON97/PON93 is fine engine-wise, the ECU Map will have to be built accordingly. The Garrett GT2860RS is a good small/mid size charger with naturally clipped fins, so the spool-up time is very short in comparison to many turbos; it would be spinning at 50% capacity by about 1500rpm, and full by 3000. However, it might also be worth looking into Vortech supercharger systems; the Vortech V2SC charger's are renownd as very reliable and having driven a V1 charged Corrado VR6, the power delivery is phenominal.

The full list for myset up is: S2 coupÃ© ABY, RS2 full engine transplant, Bosch Motronic electrics, RS2 fuel pump, RS2/964T hybrid turbocharger, MTM ECU, Schrick 263 (I believe) variable-profile cams and lightweight cam sprockets, lighened Sachs flywheel, Bosch sparkplugs, 9.0-spec leads, Carbonico CAI attatched to the turbo and relocated to front right brake duct, Schrick manifold, RS4 oil pump, MTM oil cooler, MTM/Spearco hybrid Water/air intercooler (essentially a high-spec chargecooler), 3" downpipe into 2.5" straight-cut Supersprint decat system with twin 84mm tailpipes, Big-bore S1 Quattro throttle body, Greddy digital boost controller, 42DD gagues, 4-puck semi-ceramic clutch, standard 6speed 'box running an MTM short shift from a R32 6spd. KW Variante 3 coilover suspension, lowered 35mm all round (ajusted from 40/35 for better roadholding), RS4 60R/40F variable split LSD, Porsche 964T 4-piston calipers on Brembo 330mm Drilled disks and EBC Red Stuff pads. Externally stock, besides 17" OZ Superturismo WRC alloys needed for larger brakes.

Looking at upgrading to a Garret GT28RS at some stage, for up to 30% more boost and a very achievable 500whp target.

MarlboroMan · Post by **MarlboroMan** » 20 Jun 2006, 20:15

thanks ! thats a good walkthrough and idea.
yeah i am just afraid that the octane rating isn't high enough to withstand those boost at that CR. RON97 equivalent in the US 93 octane rating which is rated in PON. i am so afraid of critical knocking that destroy everything....

wow, you must've invest alot, i've read in the mag regarding the MTM which have a new branch in hong kong, and theres a report on the audi S3 tunned by MTM to the customer. that S3 is with a 5V/cylinder turbo I4 with some minor mod that with a MTM ECU taht improve the 225horse to 250, SUS 70mm mid-rear exhaust piping, Bimoto rims, H&R coilcovers + absorber, bremboGT F50,BMC CDA carbonF intake air box and MTM front bumper.

it seems a solid ride for mild tunners.

steelsnake00 · Post by **steelsnake00** » 20 Jun 2006, 20:20

The total cost for my entire setup is approacing the Â£10k mark, alost of the work I've done myself. That also includes uprating ALL of my internal speakers and wiring to MB Quart Titanium and Rockford Fostgate parts, a Plapunkt head unit, VDO gagues, Momo 320mm wheel, RS2 seats, alloys ect.

The S3 is a similar engine to mine, a 5cyl (though this time a V5 rather than an I5), 20V Turbocharged lump. Big horsepower is only a few notes away...

MarlboroMan · Post by **MarlboroMan** » 20 Jun 2006, 20:40

Â£10k thats alot of money, you've building your car for quite some time ? how long it has been ? 500wheel hp thats too much for me, i am probalby happy with 350 engine horse whcih makes about ~300 on wheels, just something that brings me to work and a little acceleration.
audi seems like to be the last manufacturer taht build 5V/cyl valve train huh ?

steelsnake00 · Post by **steelsnake00** » 20 Jun 2006, 20:46

The entire VAG group use it, in various forms its in the Passat V5, Golf V5, SkodÃ¢ Octavia VRS, Seat Leon Cupra and Cupra, Audi S3, A4 1.8T, TT Quattro 180 and 225. It's been put in all manner of things, including a very fast modified Elise.

Â£10k includes buying the car, which I picked up running 300bhp from the RS2 engine (the only bit of modifying I didn't do myself). I've since thrown almost 100bhp and some very high-quality interior, engine and exterior parts into it; though I challange you to find another car for 10 grand that will match it performance wise

MarlboroMan · Post by **MarlboroMan** » 20 Jun 2006, 21:04

wow, tahts definately a great worthy investment. VAG groups which is the VW starts the merge or something like that ?

all the mod parts i've been searching is about combustion efficientcy to improve the a/f mixture to burn in a cleaner manner, spark plugs, cable plug wire. i've been told by alot sources that NOLOGY hotwires (the cable plug which have a capacitor inside) and denso iridium is a nice combo in the efficientcy sense, you have seen any case with taht sort of mod ? oh yeah, and theres a 'trend' in voltage regulator stuff + grounding wires too, does that really make some effect that is noticeable ?

steelsnake00 · Post by **steelsnake00** » 20 Jun 2006, 21:16

Volkswagen Audi Group. VW/Porsche/Audi/Bugatti/Lamborghini/Bentley/Seat/Skoda basically.
The 'plugs I'm using at the moment are Iradium tipped ones, they're actually built for a VR6 engine but they run alot cooler than my standard plugs and are the same fitting, just need to disgard one from the box. I'm consindering running a Fuel Pressure Regulator because previously (though not on my current map) I've had overfueling problems (as is common with custom ECU's).

The effect of uprating electrics is dubious at best, maybe an extra MPG and lower emissions but very little power difference. However, batteries can make an awful lot of difference when it comes to ICE. One entertaining moment a few weeks ago pitted my sound system (Rockford Fostgate front speakers, MB Quart rear speakers and overheads, Fostgate tweeters, Phoenix Gold power cap, MB Quart wiring and a Blaupunkt head unit and 6-disc changer) against some fools in a Saxo with 2x15" Mutant subs, alot of 6x9's and Sony head units and amps. The Fostgate system is much louder, the sound quality is clearer and it doesn't even need to run off any amplification (besides the 4x100w built into my head unit thats current running 8x50 jacks to power al 8 speakers), and alot of the power to enable me to do that without the distortion is a good quality battery and wiring.

For some bizare reason, I really want a Carbon Fibre cam cover, just for show.

MarlboroMan · Post by **MarlboroMan** » 20 Jun 2006, 21:37

wow that means its a huge organization with sharing resources and knowledge to build better engines and cars. i am really looking forward about whats up for the next development and what they can offer in near future.

hmm. i think i will take note of those electrical stuff too when modding my car.
LOL, yeah CF valve cover sure is a good touchup in the engine bay.

thats very good forum-posting with you, i learned alot of stuff, i really like to discuss about performance and efficientcy mod on cars. nice to meet you steelsnake00. see you some other time mate.
thanks for the patient and time to answer my questions, you've been really helpful !
goodluck and godspeed

boganbusman · Post by **boganbusman** » 21 Jun 2006, 11:17

You should do an apprenticeship as a mechanic MalboroMan. You will really learn a lot, especially since you seem very interested in cars. I've been doing a pre-apprenticeship for the last 3 weeks and I've never learnt more or had as much fun before.

You'll get the skills you need to perform your own maintenance and modifications, instead of having to ask about it here

Me and some mates are actually going to get a Prelude as well, and we're going to turn it into a crazy Summernats cruiser with a chop-top and doodle seat in the boot. Apparently we can get a road-worthy Prelude for $300, and a friend of a friend is an ameteur airbrusher who wants to show off their work (we have a Ninja Turtles theme in mind). Is that a plan or what!

btw, what happened to the Charade?

MarlboroMan · Post by **MarlboroMan** » 21 Jun 2006, 12:24

yeah the charade reuiqres too many custom made parts in order to fit in the 4E-FTE, drive shaft, engine mounting points, ECU and wiring harnesses. moreover i have to move the battery to the rear. just too many that the cost will go too high. and the mechanic told me that the chassis has a few spot thats rusting, even though the chassis reinforce frame fit in, it is the reinforce frame that hold the chassis together when the rust go more serious. so as a result failed running back to the CB23 carbbie

i wish i can have that oppurtunity too that to be an apprentice in a garage or what, but sadly i will start very soon working in some IT field in some programming stuff which have alot things to carry out and most probably over time very frequent. all the time i do is read and watch how my friend modding. Never really into modding myself yet, i guess i am collecting more info before i start building up things, and i am poor. and i really want to own myself a car rather than taking it free from dad. well, i guess i better off to work 1st

steelsnake00 · Post by **steelsnake00** » 21 Jun 2006, 21:50

For all those interested:
http://www.dragtimes.com/Audi-S2-Timeslip-9110.html
Is the spec and 1/4ml times.

Tunerfreak · Post by **Tunerfreak** » 24 Jun 2006, 12:54

Ive got a question.

My recently purchased car has a 4A-FE EFI 16v engine. If I overaccelerate or put my foot right down it climbs revs normally for a while and then stops revving for a short time then continues on. It happens most the time and its quite annoying, its fine for everyday driving though. Ive been told its in the nature of the economical 4A-FE to cut power now and then in situations like travelling at city limits in top gear, but I don't know if acceleration is tied to this. Also some orange light comes on the dash eventually and I havent checked yet to see if it could be related. Its not really a problem, I just want to make sure it dosnt present itself as a problem later on.

The car is a AE101 1993 Toyota Sprinter Marino with about 84kw (116hp) if it helps. The car is in a great condition but it has 300,000k's on it. It is in such a great condition for a car having been that far.

Grez~Supra_RZ-S · Post by **Grez~Supra_RZ-S** » 24 Jun 2006, 23:41

Thats an...odd problem. Id suggest giving the car a good service, swap the plugs, clean out the inlet of your engine, and clean the sensors in the TB, as well as an oil change.

Tunerfreak · Post by **Tunerfreak** » 25 Jun 2006, 01:45

Some body hit me round the head XD I just discovered the seller left me with an empty tank and the car is running silky now

the orange light was of course... the fuel light (And it even makes it more obvious with a beep as it comes on)

The old owner must have been driving the car around quite alot with the fuel light on becuase I reached the fuel station just as the car started to badly hop around

PSZeTa · Post by **PSZeTa** » 29 Jun 2006, 10:04

My bro has a strutbar but has some difficulties in mounting it. There's one engine part sticking up too high causing the bar to make contact.

How much difference would it make in the strength of the bar if you'd cut out a piece?

steelsnake00 · Post by **steelsnake00** » 29 Jun 2006, 10:46

Alot, most of them are hollow and it would essentially remove the purpose in the brace to take a chunk out of it.
Tell him to buy one thats purpose-designed for his car. That ought to solve the problem.

PSZeTa · Post by **PSZeTa** » 29 Jun 2006, 17:08

Actually, it's meant for his car but the engine type is causing trouble..

Oh well, lol.

Grez~Supra_RZ-S · Post by **Grez~Supra_RZ-S** » 02 Jul 2006, 00:51

The only thing you can do really is to have one custom-made. It wont be expensive, and I should think any alloy fabricator will happily take your money in return for making one. It doesnt surprise me though, my friend ordered a Mugen one for his CRX, and that took some fiddling to get it to fit over the B16 engine.

steelsnake00 · Post by **steelsnake00** » 02 Jul 2006, 18:34

The brace on the S2 is a custom jobby, as only ABT ever made a strutbrace for the 20v I5 Turbo engines, and that was only ever on the Quattro Sport.

PSZeTa · Post by **PSZeTa** » 23 Jul 2006, 03:32

Are (turbo)diesel engines weaker compared to engines running on petrol?

Some guy told my brother that it isn't smart to change a lot of things on turbodiesel engines, cause they'll tend to fail a lot quicker.

boganbusman · Post by **boganbusman** » 23 Jul 2006, 05:49

Well this 'guy' is a fool.

Diesel engines are made from cast iron and have extremely chunky parts, because they produce a lot of torque. But what sort of things does your brother want to do with it?

Cpt.Razkit · Post by **Cpt.Razkit** » 23 Jul 2006, 07:33

How much should a 1995 Mitsubishi 3000GT VR-4 with 84,549 miles?

Im in the market, and I really like the 3000GT.

boganbusman · Post by **boganbusman** » 23 Jul 2006, 07:44

It heavily depends on where you live, so the best way to get an accurate figure is by doing your own research on the internet and in newspapers.

Here's a link anyway: http://auto.consumerguide.com/Auto/Used ... iewprices/

I've heard that they're very nice cars, so good luck finding one.

Cpt.Razkit · Post by **Cpt.Razkit** » 23 Jul 2006, 07:54

Well the website doesnt have a price, and I live down the street from around 10 Car Dealerships and its in one of em. I guess i have to go check it out tomorrow =D

PSZeTa · Post by **PSZeTa** » 23 Jul 2006, 11:53

boganbusman wrote:Well this 'guy' is a fool.

Diesel engines are made from cast iron and have extremely chunky parts, because they produce a lot of torque. But what sort of things does your brother want to do with it?

Hehe.

My brother has been some sort of ricer for a while. Since there are no aftermarket bodykits available for his car, he had to do everything custom. Lots of things looked great but when you got into the details it'd be ugly, and his car has evolved through the time. Though it isn't that bad now. He got some nice rims too yesterday at some kind of tuning/styling company over here.

http://avtoplaneta.com.ua/new/images/ca ... _racer.jpg

Since he's kind of wacky, he doesn't get a petrol car to tune but just wants to tune his turbodiesel.

He got a ECU upgrade a while ago and a cold air intake ( Pipercross Viper ).

After 3 weeks or so, he's gonna let them put a (larger) intercooler in his front bumper. He was looking for a dumpvalve too, though the shop said it wouldn't be that noticeable because the turbo isn't all that powerful with low boost.

Any thing else you or others recommend?