im not building any boost untill 3500 rpms i still hit 15 psi but is the lag normal??
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stealthtt24
Well-known member
You don't start building boost till 3500? Have you check for exhaust leaks and boost leaks?
think i found he problem missing 2 studs on the far right side of the manifold u no where i can get replacements??
stealthtt24
Well-known member
awesome thanks
gvr4ever
Well-known member
Do you have the stock intake? Stock the car actually had some lag due to restrictive intake, IC and exhaust. Are you getting 16psi at 3500RPMs or does it take till 3500RPMs for the boost to really start to build up? I think the GVR4 first gear actually adds a little lag too.
yes stock intake pipe but all the rest is aftermarket into my fmic but it did the same with all the stock piping and it does it in every gear i see no boost untill 3500 rpm then she takes off like a rocket
gvr4ever
Well-known member
What exhaust manifold? Boost should build smoothly, not an on off switch.
Could be your boost controller.
Does boost fall off near reline? Big 16G should be able to hold boost up top better then the stock turbo. If it's falling off, you could have a boost leak.
Could be your boost controller.
Does boost fall off near reline? Big 16G should be able to hold boost up top better then the stock turbo. If it's falling off, you could have a boost leak.
Stock manifold And no it doesnt seam to fall off
SouthCaliVR4
Well-known member
what type of exhaust do you have? When I first put in the evo3 16g I couldn't build sh*t for boost. dropped the cat & still barely stock levels. When I put on the 3" exhaust man what a difference.
Full 3 inch but.the mesh on the dp is blown out so im basically running open dp
gvr4ever
Well-known member
I think you just answered your own question. Fix the exhaust leak...
Replace the missing exhaust manifold bolts too. If it's a stocker, they are known to crack and leak too.
Replace the missing exhaust manifold bolts too. If it's a stocker, they are known to crack and leak too.
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turbofonz
Well-known member
Quoting gvr4ever:
Do you have the stock intake? Stock the car actually had some lag due to restrictive intake, IC and exhaust. Are you getting 16psi at 3500RPMs or does it take till 3500RPMs for the boost to really start to build up? I think the GVR4 first gear actually adds a little lag too.
Is this true about the stock intake? I assumed so but haven't tested it yet. my vr4 is on speed density but still has he factory rubber intake with no MAS and the car is way laggier than my 1g.
New intake is the plan once I relocate my battery; but I've never read that the intake is a restriction. just thought it was.
on an evo3 I'm getting 18ish psi ~ 3300 depending onthe gear
Do you have the stock intake? Stock the car actually had some lag due to restrictive intake, IC and exhaust. Are you getting 16psi at 3500RPMs or does it take till 3500RPMs for the boost to really start to build up? I think the GVR4 first gear actually adds a little lag too.
Is this true about the stock intake? I assumed so but haven't tested it yet. my vr4 is on speed density but still has he factory rubber intake with no MAS and the car is way laggier than my 1g.
New intake is the plan once I relocate my battery; but I've never read that the intake is a restriction. just thought it was.
on an evo3 I'm getting 18ish psi ~ 3300 depending onthe gear
gvr4ever
Well-known member
It wasn't just the stock rubber intake. It was a combination of the stock intake, stock MAS, stock IC, stock exhaust that caused a slow spool up time. The rubber pipe doesn't really slow down spool up.
I guess I could have worded that better. Sorry for the confusion.
I've gone from stock to fun on my current Galant and a old Talon. On both cars, exhaust and IC upgrades really helped with spool up time. The talon was FWD and had a much shorter gear. With a almost useless 1st gear, IC and exhaust upgrades, the 14b had almost zero lag.
I guess I could have worded that better. Sorry for the confusion.
I've gone from stock to fun on my current Galant and a old Talon. On both cars, exhaust and IC upgrades really helped with spool up time. The talon was FWD and had a much shorter gear. With a almost useless 1st gear, IC and exhaust upgrades, the 14b had almost zero lag.
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