I will be running a revhard manifold (maybe). I tried searching but Only come up with wastegates for sale and I cant search the word which. I have a fully built ls/vtec. t3t4 .60/.63 60 trim. I want to run about 16psi on track days but about 12 daily. Which wastegate and spring combo should I use? Or better yet which site can I go to to learn this myself ./thanks

 

Well the revhard manifold is flanged for a 35/38mm gate so that's what you should run. So a tial 38mm gate and 12psi sounds like just what you need!

 

Tial 38 will do just fine...I'd be more concerned about getting a different manifold versus worrying about the wastegate. I can't rememeber if the RH wastegate flange is centered or offset, but for 400whp, I'd probably upgrade to a "better" manifold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Autoworks &raquo;</TD></TR><TR><TD CLASS="quote">Tial 38 will do just fine...I'd be more concerned about getting a different manifold versus worrying about the wastegate. I can't rememeber if the RH wastegate flange is centered or offset, but for 400whp, I'd probably upgrade to a "better" manifold.</TD></TR></TABLE>

Drag is the super crappy one, revhard it not to bad at all. Its not dead center but its not way off to the left with restriction in the center like the drag either.

 

The manifold is still weak in design no matter how u look at it.

But it will getr done.

 

i ran the drag mani on a d motor and made 400+ the mani is not as bad as peeps make it out to be, you will be fine. can more power be made with another mani? yes. will it work for what your goals are? yes. i ran a ssauto (tial knockoff) 38mm on mine. no creep, no spikes, held boost 100% like it should.

 

ok i got a custon manifold with the wastegate in the middle. 35 mm good enough?

 

Go 38mm for insurance

 

sufficent spring rate to boost pressure will suffice you thurst for whatever whp you want to hit 38MM will do good whatever you can afford will also work


manifold is the most important thing so its good you got a better manifold any pics of it?

 

not yet but in a few days once it comes in I will post it. its a tial 35mm

 

just run the correct spring for the ammount of psi you are going to be pushing and you should be fine

 

the drag manifold will get you where you want, but if you swapped it with a nice tubular mani. your power gains will be alot bigger. btw a nice 38mm wastegate will be great.

 

if it comes with a 5,6,7psi spring and he wants more cant he just use a manual boost controler to get more boost?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snowbunny &raquo;</TD></TR><TR><TD CLASS="quote">if it comes with a 5,6,7psi spring and he wants more cant he just use a manual boost controler to get more boost?</TD></TR></TABLE>

Rule of thumb... you typically only can get 2x the wastegate spring pressure.

Run a 38mm at least.

 

ok..so 5psi spring would only be good to 10psi with the mbc?
why is this?

 

lol i had a 7.8psi spring and ran 25psi daily...no creep, no spikes, all on a drag mani...guess i was the exeption to all the rules

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fast2camciv &raquo;</TD></TR><TR><TD CLASS="quote">lol i had a 7.8psi spring and ran 25psi daily...no creep, no spikes, all on a drag mani...guess i was the exeption to all the rules</TD></TR></TABLE>

Was that with a turbonetics wastegate? The kind with the manual allen head screw you can definetely cheat.

There are ways to 'cheat' but the rule of thumb is 2x the wastegate spring pressure with a standard type of boost controller.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">

Was that with a turbonetics wastegate? The kind with the manual allen head screw you can definetely cheat.</TD></TR></TABLE>he said earlier in this thread that it was a Tial knockoff

 

yea i was using an ssauto knockoff, 7psi spring, drag mani, t3/t4 57trim, on a sohc. also using a 2 stage boost controller...just a manual ball and spring boost controller with an electric solenoid at the "t" in between the wastegate and the mbc. no creeps, no spikes...held perfect.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fast2camciv &raquo;</TD></TR><TR><TD CLASS="quote">yea i was using an ssauto knockoff, 7psi spring, drag mani, t3/t4 57trim, on a sohc. also using a 2 stage boost controller...just a manual ball and spring boost controller with an electric solenoid at the "t" in between the wastegate and the mbc. no creeps, no spikes...held perfect.</TD></TR></TABLE>

Nice. All the things that everyone says will fail. When was full boost?

 

25psi by 5500.