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Originally posted by TRBOBRK
Where can I buy a bolt on supercharger to up the output to 300hp? They have them for VW/Audi. Or turbo or nitrous or what ever you want. Swap a 2.0l 90hp I-4 for a 2.7l 300hp V6 is the most normal thing you can do to a VW.
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Well, you can't buy a supercharger for the SR20 (superchargers suck compared to turbos anyway). But, you can buy a a couple of different turbo kits. As for engine swaps, it doesn't get any easier than the SR20DET.
Quote:
Originally posted by TRBOBRK
Now I'm not being sarcastic, but where is the SR engine aftermarket?
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Alive and quite well if you know just a bit of where to look. We don't have as broad a range of offerings as for VWs or Honduhs, but almost all of what we do have is very high quality and the price is reasonable.
As I mentioned there are two turbo kits and an engine swap that even the brain dead can do. There are several companies producing cams for the SR20, however the two real considerations are JWT and JUN (and possibly Piper, but I'm not familiar with test results for them). JWT offers cams that will net you around 16 hp with only the cam change. They offer cams that will net you close to 30 hp with a valve spring and retainer change (required due to the valvetrain harmonics and the more aggressive cam profile). There's several headers available, but most people choose the Hotshot because it makes the most power and is high quality. There are all sorts of goodies available to build a killer engine (see my website, specifically the Beast articles for some info on that). In sort, there is an excellent aftermarket for the SR20. There just are not as many companies offering parts, but the ones out there are generally not crap, unlike the situation with many cars.
Quote:
Originally posted by TRBOBRK
With out doing a engine swap what can I do to my G20? From driving different cars that are weighing differnent amounts I feel that I would be happy with about 230-250HP for my car that weighs 2900
How would I start modifying?
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Oh my. How about 400 hp to the wheels with off-the-shelf bolt-on parts? This is repeatable and is not a one-off shop special. The F-Max turbo kit has been used by many to produce anywhere from 250-400 whp. People all over the country have used this kit, installing it themselves in their own garage. You don't have to go to a specialist to get it done. BTW, this is with stock internal engines with the USM 9.5:1 CR engine! No internal mods what so ever. Hotshot makes a kit that will get you about 250-300 hp to the wheels on a stock internal engine.
If you are interest in these or other performance upgrades for the SR20, I or others here can send you to the right places - places with good folks who won't rip you off.
Quote:
Originally posted by TRBOBRK
Also what is the differences between the pre 93 and 93.5 and after engine?
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The 91-93.5 engine has the high port head. The 93.5 engine does without the AIV valve on the front of the engine. The 94 and later engine has the low port head and later versions have more emissions crap added to it. This was discussed in greater detail in another thread that I cannot remember the name of at the moment.