jessejames Posted May 31, 2009 Share Posted May 31, 2009 I have a s13 1994 SR20DET blacktop. I have the following mods: 3" Full Exhaust with Cat. Ebay special FMIC with 3inch piping. HKS SSQV Walbro 255 fuel pump. Running stock boost at 7psi. I'm still using the stock 240z Rear end. 3.3somthing I had more car dynoed this past weekend. I put 186hp and 176ft'lb of torque. Do these numbers seem right to you? I had a found a link to import tuner http://www.importtuner.com/powerpages/0804_impp_1991_nissan_240sx/1991_nissan_240sx_fmic_blitz_boost_controller.html They had 214 at the wheels. Is my SR a dud? Quote Link to comment Share on other sites More sharing options...
The love of JDM Posted May 31, 2009 Share Posted May 31, 2009 Check your compression and boost leaks.... stock sr red tops typically are 205hp at the flywheel. s14 sr's are a tad more Compression should be around 160 for each cyl I made 202hp 198ft tq on full stock motor with lightend flywheel s14 fuel pump and greddy fmic, type rs BOV 3" pipes, series II redtop with timing retarded. 3" full straight exhaust with test pipe. Quote Link to comment Share on other sites More sharing options...
jessejames Posted May 31, 2009 Author Share Posted May 31, 2009 would timing retarded reduce your power? and what should the compression be? When i bought the motor it was tested then, and the guy I was with said it matched his fine. All i remember was the number was the same is all four cylinders. Quote Link to comment Share on other sites More sharing options...
The love of JDM Posted May 31, 2009 Share Posted May 31, 2009 Retarded timing at the CAS helped a tad in my motors top end power. I edited my first post with the compression results. Quote Link to comment Share on other sites More sharing options...
jessejames Posted June 4, 2009 Author Share Posted June 4, 2009 i've not had a chance to check compression yet as i've got a big exam this weekend, but I recall that my boost gauge hits 7psi. Is it possible that the rear end ratio is reducing the power? I'm running the stock 3.3 on the 240z. I think the sr20's are usually paired with 4.08s. Any other suggestions? Quote Link to comment Share on other sites More sharing options...
rvannly Posted June 4, 2009 Share Posted June 4, 2009 just out of curiosity, what engine management are you running? Those are some pretty low numbers. Quote Link to comment Share on other sites More sharing options...
jessejames Posted June 4, 2009 Author Share Posted June 4, 2009 I've got the stock ECU. I Believe its out of a 1994 180sx. Quote Link to comment Share on other sites More sharing options...
rvannly Posted June 5, 2009 Share Posted June 5, 2009 Do you have a boost gauge hooked up? My SR s13 had this weird boost problem where after it reached full boost it would creep off down to 5 ish by the time it neared redline. It was running the stock boost regulator unit, so I bypassed it and ran a straight vacuum line to the wastegate. Quote Link to comment Share on other sites More sharing options...
jessejames Posted June 7, 2009 Author Share Posted June 7, 2009 yes i have an autometer boost gauge. I usually hit 7psi on it. I did a compression test. I let it crank 4 times. It came up with 145psi in all four cylinders. Quote Link to comment Share on other sites More sharing options...
280zjoel Posted June 13, 2009 Share Posted June 13, 2009 you will feel a big difference if you get 3.9 or higher gear ratio in the rear. i had the 3.5 gear in my 75 280z and when i dropped the 3.9 in it, it was a day and night difference. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.