I run a gt35r mase kit at just under 20 psi, making 475 whp on slightly better than pump gas. I run a non restrictive 3 inch exhaust.

I fully spool by 5700 rpm seems a bit late just wondering what other people spool by on similar setups.

I'm thinking cams or Woodruff keys could help.

Thanks

 

do you use an electronic boost controller?

 

I think you can help spool and response in one of the settings if you're running AEM EMS with a boost solenoid.

 

Yeah i use aem boost solenoid.

I have a had a play with the boost tables, at the moment if i request say 14.8 psi it gives me 19 (boost compensation is off) which is the boost i actually want in 3-6th gear but not sure how this would increase spool rate ie lower revs.

Not sure if 5700 is normal for a gt35r?

Thanks

 

well, that shows that you need to fix those tables. what you request is what you should get, and then you can manipulate spool.

 

So i can really improve on it as far as when it fully spools by in revs? - i find it hard to believe that it could drop it much say from 5700 to 5400 for example - not doubting you, just it would be awesome if i could.

I have played with these tables just didnt think requested vs actual would make a difference to spool - i admit its off at the moment.

My boost is held all the way to redline at 19psi which is what i want.




Cheers

 

Waste gate spring makes a difference in spool up at higher boost levels. I opt to test out the 4 port solenoid rather than changing out the wastegate spring.

Ptuning Kit GTX3076. E85. 25psi - 30psi. 7 lb wastegate spring.?

You can definitely notice the difference on the butt pull between a 3 port and a 4 port. Boost just comes on faster when going from 4K rpm to 5K rpm on the boost gauge and holds steadily to redline.

The thing I don't like about the 4-port solenoid is that it is very sensitive to small duty cycle changes. Small changes results in large oscillation of boost. Took me a while to dial it in on the street. I can't even tell you how a 4th gear pull feels like. Just hold on the steering wheel and point it as straight as possible, even then it is a struggle to keep it straight. Wish I could rev it to 10K rpm, but it is way out of my comfort zone.

 

is this aem v1? use boost control by speed setting, and you can tweak in there and get it all dialed in. def room to make it spool faster.

 

the point is ? u better use higher pounds westgate spring for higher boost ?

 

In the boost target comp window, you need to reduce the % at the 15psi to ~ -60%. It is mainly trail and error. Reduce the boost comp % value until your boost gauge matches your request boost of 14.8psi. Your boost comp % is too high that is why you are getting 19 psi.

Your boost table is set 99.6 duty cyle. You boost comp % at 15psi is ~ -45% duty cyle. 99.6 - 45 = 54.6 duty cycle. At 54.6 duty cycle, you make 19psi.

Yes. Use a spring close to your target boost if you are running a 3 port boost solenoid to increase spool vs. rpm. Or run a 4 port solenoid.