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Topic Review (Newest First)
09-03-2005 11:01 PM
UMDivX T3 is actually a Garret turbo, T3/T4's can be found here:

There are many places to find those turbo's that is just one of them.

- Josh
09-03-2005 10:59 PM
UMDivX three ways to lower compression:

1.) new forged rods and pistions, using lower compression "cupped" pistions

2.) using a thicker copper head gasket

3.) doing the infamous "hemi" mod, you will find out more about the hemi mod on the escort forum, basicly when the SPI engine came over from eruope more material was added to the head in the combustion area for emissions reasons, you can get the "extra" materal machined out, which rounds out the head's combustion chamber, and in return makes it out to be a hemispherical chamber hence the reason we call it the hemi mod.

any combination of those three can be used, heck all three of them can be done, the two cheapest ones would be the copper gasket and the hemi mod.

- Josh
09-03-2005 10:54 PM
Tetsuo T3 is turbonetics right? and what are good ways to lower compression?
09-03-2005 10:33 PM
UMDivX well yes and no you'll do the same numbers, if you look at that link and scroll down a bit you will see a post done by a guy names jeffescortlx (he's my hero when it comes to the SPI) anyways he hit 212whp/262ftlbs of torque with a 1.9l SPI hybrid motor (they talk about it in that link) he was never able to his those numbers with a stock 2.0l SPI motor, by lowering the compression with doing the hybrid motor and upping the boost he was able to hit those numbers.

Also for your questions about what is a good turbo, depending on the trim as I said before a T3/T4 hybrid turbo would be a great turbo to work with. I've seen a zx3 with a fully built engine hit 320ftlbs of toruqe @4500 rpms and 30+ psi, I say 30+ becuase we dont know as the boost gauge pegged out on the dyno that day :)

He was also running a severly bad tune as the tuner normally does Diablo Sport tunes and he was running an SCT setup, he was also doing a Suck through MAF setup and was venting his BOV to the atmosphere which was causing him to have sevear ideling issues, and finally his oil return line off of his turbo was tapped to low in the oil pan which was causing the oil to back up, over heating his turbo, he basicly got a great setup but a screwed up install, he finally blew his seals on his turbo and so we took the setup off and put a race header on until he can get his turbo rebuilt.

really in all honesty turboing isnt that bad but just as that link says (the EFOA one) the first rule to boosting is make sure you've got tuning taken care of, if you dont have that done then your going to screw yourself in the end, acutally you might not but its highly recomended to get tuning done right away.

- Josh
09-03-2005 10:22 PM
Tetsuo see i was reading the the escort page you sent josh, and it basically layed out that you up the boost but lower to compression to keep it safe your still gonna achieve the same numbers
09-03-2005 10:17 PM
Originally posted by tin_maddog
I thought under low compression, you had to up the boost to get the same horsepower levels, but it was a bit safer...
yes in order to hit higher numbers, more boost is required, but depending on your turbo, how it flows, its optimal range, ect.. will determin what boost levels it should run at.

But generally if you want to run more boost, reduce the chance of deto, and still hit the #'s you want, lower compression is always desired.

- Josh
09-03-2005 10:17 PM
Tetsuo yea i saw that on the page josh gave me, so then can you recommend any turbos that spool at 2000 rpm tin?
09-03-2005 10:14 PM
tin_maddog I thought under low compression, you had to up the boost to get the same horsepower levels, but it was a bit safer...
09-03-2005 10:13 PM
Originally posted by fokuzx3
....low compression doesnt allow for more boost....
Are you kidding me??? The whole reason behind lower compression is to allow for more boost, and to reduce the chance for deto at the higher boost levels, and in return is the higher whp and tq #'s.

- Josh
09-03-2005 10:09 PM
fokuzx3 just for some pointers..unless your puttin 15+psi of boost , low compression pistons wont do anything...low compression doesnt allow for more boost, it just maximizes your hp/tq gains from the boost
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