Thread: High rev and JWT computer

I wanna hear some thoughts on this. If you are revving to 8K+, what kind of results would you see with a stock computer once the timing and fuel go static?

I know you can only rev to 8Krpm and after that point the engine will still rev higher, but the computer will no longer make adjustments to timing and fuel maps.

So what exactly would you do if you needed to stay OBD2 with a JWT computer, but wanted to rev to over 8K? Especially since I am turbo, the only way I see this happening effectively is if I had a standalone.

I would like to see over 8K without leaning out, is this going to be an issue? What do most VE guys run when they rev to 9K, and what ill-effects do you see when revving into the nether regions of the computer?

I have been thinking about revving a bit higher, but I don't really know how this motor will react to higher revs once the computer runs out of map.

I run a nistune board which allows you to adjust maps beyond 8000rpm.
Only using an 8500rpm limit at the moment, but I may push this a little more if power holds up with the ASP headers.

in regards to the question, I dont think its that big a deal as long as your trailing off boost or timing up high already

idk bout jwt... but heres an alternitive solution possibly..

http://www.sr20-forum.com/calumsult/15847-check-out.html

Ya if only calum wasn't so dang busy! I'd like to go with his stuff but the turnaround time is pretty crazy right now.

Once you go over 8k it will just read the last cell for ignition and fuel. On Ivan's ve when I tuned it for the Frank S4 I had to give the last cell more fuel then the rest and it would go out to 9k with a the A/F getting richer and richer.

he's backed up for sure, took little over a month for me to get mine, but i've only had the engine in less the 2 weeks.. plus i had to wait a week or so on an oil pan.. so really im only "without a proper ecu" for 3 days..
(jus put oil pan on yesterday and oil in today).. first time i've been able to drive her beside the quick 5 min drive home from where i worked on her..

at 8k it takes the values and just keeps them there for the rpm afterwords. so im pretty sure the timing stays at the last degree it was at 8k and i adjust fuel with the safc after 8k. it just needed to be leaned out slightly to 9k

I'd say that my standalone (Link G4 storm) is the best value-for-money part of my conversion. Being able to optimise just about everything is a great advantage.

What are the limitations to running a standalone with regards to the emissions regulations you have in the US (and your state in particular)?

Ah, the SAFC! I may just do that!

I live in Utah, where you must have an OBD2 test done. They plug into the port and check for codes, and readiness monitors to ensure compliance. If the light isn't on and the values are good, then you pass. If not, then you fail.

I have gone through great lengths to keep from going with a standalone. I am going to maintain the car as an OBD2 legal vehicle so I can still drive her on the street. It would suck to not have a car

I would like to rev high enough to see power dropping off before setting a rev limit. This will help to broaden the powerband a bit. I don't know if the VET cams will like to rev to 8k with this new manifold, but we will see!