A community of enthusiasts dedicated to Nissan's SR20DE/SR20VE/SR20DET engines.
Start here: forum search. Be sure to search on what you're looking for before posting a new thread.
You are currently browsing the forum as a guest. In order to access special features, the image gallery, and post you will need to be a registered member. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact the administrator.
So what should I set the timing to given the following;
B13, stock ECU, JWT S4's
I'm currently running 19 degrees on my stock cams, which proved to be optimal when we ran a timing sweep using the Consult at the recent Mass Dyno Day. I know that it's recommended to run the cams at 15 degrees with the JWT ECU, but what about with a stock ECU?
Thanks,
Chris
92 SE-R
HS Header, HS CAI, UR 2 pulley set, 2 1/2" mandrel exhaust with Dynomax Ultraflow resonator & muffler, S4's this weekend!!!!
__________________
cogito ergo zoom................
i thought a read 15 some where on the forum. i've been seaching and can't find the post. i'm going to put my s4's and JWT cam gears on this week end, if i can find out the best timing and advance for the setup. i have a JWT ecu but not the s4 program.
if i find something i'll post it back here chris. later
When I had my stock ECU and I went to the dyno I got the best results at 15 degrees. Like mentioned in a above post they do not react well to advanced timing.
I put down very good numbers with the stock ECU.. So set the car at 15 degrees and you will be fine.. Even with the but dyno the car feels quicker . I set it at 17 once and the car died up top.
__________________ -Rob- Get ready for a big SE-Rprise
Originally posted by CowboyDren What they're saying is true, but the only way to be 100% sure is to test it on a dyno. Forgive me, but what is a timing sweep?
Ahh, timing sweep is a very cool thing. The easiest way to do it is with a Consult. The Consult allows you to advance or decrease the timing through its interface, without manually moving the distributor.
You start by manually setting the timing at a high number like 22*, and run the car on the dyno. For the next run, pull the timing back to 20*, next run 18* etc. Once the power starts to fall off, raise the timing by 1* to find the optimal point. 19* was optimal on my car with stock cams and 89 octane gas.
Would this 15 degree's timing be true for all s-series cams or just for S4's? The reason I ask is, I put S2's in my car and I have been getting really low ET's and low trap speeds, and I could kinda feel that I didnt have top end. I set my timing at 19*, and I just bumped it down to 15 and it felt a lot better up top. I dont have the JWT ECU BTW. Any advice would be appricated.
JWT S-series cams for non-roller engines are intended for 15* of ignition advance. So are roller S3 cams, actually, but roller engines aren't a part of the discussion at hand, are they?
