hey what's up guys. how much power you'll think a stock s13 sr20det with the following upgrade: a spearco intercooler, greddy blowoff valve, 3in greddy downpipe, with a 4in or 5 in Apex exhaust? and also a stage 2 clutchmaster clutch.
what do you think the 1/4 mile time will be, the car is a 89 s13, no lsd, exterior stock, not drop, stock rims, etc. beside the engine swap and upgrade on it?

hmmm since the only power mods really listed are the downpipe and a 4/5 inch Apexi exaust, whats that LOL? The intercooler won't help HP much but is a good upgrade if your going to raise your boost, which I don't see you listed a boost controller so the stock side mount intercooler would be just fine........ stock boost with a different exaust might give you 15 or so more HP if its done right... without a limited slip, stock suspension, hell I don't really know maybe low 15 or high 14 secs passes.

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When I get mr sr20 and start slapping on power mods, Im first going to mess with the intake and a complete exaust system from manifold down. With 3" downpipe, 3" test pipe, and I personally want the APexi GT Spec exaust... but that choice is yours. With all that on stock boost you might gain 20-25hp. After that Im going to proceed with my 'stage2' mods like BOV, FMIC, underdrive pulleys, boost controller, Cam gears, and a new ECU. My 'stage3' upgrades will be a thicker head gasket, rocker arm stopper, valve springs, Cams, and probably a Greddy intake manifold. With all those mods I could safetly run the stock turbo at its maximum effeciency point, either a S13 or S14 sr20 with about 15psi of boost and feel good about it. welp what happens after I spent all my money and save more and want to go faster, then comes MY 'stage4' upgrade =) new turbo, new fuel injectors, ECU reprogramming, maybe some new pistons lower the compression even more, some new rods. Some point throughout my mods I will put on a new fuel pump and anything else the fuel system needs to keep up with the turbo....

thats my plan of mods, I have been interested in Nissans for awhile and picked the 240 as my starting point, I think it is a great little car and you do a lot of bolt on mods to it to get power and change the appearance. I was either going to go with a Z31 and eventually swap in a RB20DET and make it a 200ZR, but after weighing my options I like the 240 better and can't wait to get a sr20det.

Nah...a S13 SR20DET runs like a 14.4 in the quarter...w/a downpipe and exhaust...you should be around 14.1 or so...4 inch exhaust? Never heard of that...I know the Apex'i GT Spec runs 3.74 inch piping all the way...but it's not 4 or even 5 inches as you say...

i'm not really sure what size the exhaust is but you can actually put your entire hand in the piping. so there really isn't a great gain? i was thinking it will give at least 40HP gain from stock. they say the stock s13 sr20det can hit 250 whp with a safe but also dangerous boost of 15 psi. a friend of mine is going take his car to Palmdale and find out what his s13 can do.