Gtr Too Much Lag?

[byebye]

Since i've bought my r32 gtr its been a lot more laggy than my mates, its not really full boost til 4500-5 and doesnt kick in that hard

My mates seems to kick in real hard down low, about 2500 from memory

Mines still stock turbos but its got adjustable actuators on the turbo's, ive adjusted them to run 10 psi and there seems to be heaps of pressure holding the internal gates closed, one thing i noticed is it hasn't got the boost restrictor in it but only runs 10 psi maybe still the actuators are adjusted wrong even though theres a lot of pressure keeping the gates shut?

It also has a big cooler but surley that wouldn't cause that big of difference in lag!?

Its got stainless dump pipes that go to a 3.5 inch exhuast not that i see how that would make it laggy lol...

apart from that its stock

Any ideas?

cheers

[R.3.2.G.T.R]

restrictor out should see u running 13-14psi.. actuators may be adjusted wrongly as suspected.. should be on full boost around 4000rpm

[byebye]

Might be worth putting some stock actuators on it then? but there seems to be heaps of pressure to hold the gates closed!

Full boost by 4000? wonder why my mates spools so quick then, his does have adjustable cam gears but i didnt think it would of made 1500 rpm difference

[GTR-32U]

If your mates one has adjustable cam gears that may explain why his ramps onto boost harder and faster.Cam gears properly dialled in can increase low end and spool up.not too sure as to what extent however

[sh@un]

is the engine free of excessive blow-by?

[some_cs_student]

Adjustable cam gears + Power FC (or other aftermarket ECU) + good tune does make a large difference in spool time, I wouldn't say 1500 RPM but its a noticeable difference.

[byebye]

To be honest i havn't noticed blow by, his was tuned by dr drift standard ecu

Is what some people saying is that his just seems to be unusaly responsive and mine about normal? i didnt think i stock car would have that much lag

[Adriano]

Stock gtr's are quite laggy for a factory car, doesnt sound like your mates car is stock if it makes full boost by 2500

[slydn32]

hey mate, same kinda thing i found with my gtr stock everything except for zorst, full boost by 4000rpm atleast, not a reall kick in the back either... untill i boosted her to 15pound, made a world of difference,cam gears are going in atm so hopefully that will help lag.

but yeah adjustable actuators on stock turbos not so sure, maybe put factory ones on and save ur self time mucking round.

ball bearing turbos help too....

[byebye]

A mates got some n1 actuators sitting there, are they the same? i don't want to run too much boost untuned

Edited February 21, 2009 by byebye

[MrStabby]

FWIW my stock turbos + EBC make 13 psi by 3300rpm, but has Nistune. Saying "full boost" without quoting the boost level is meaningless because the higher boost the longer it will take to get there... but yeah 10psi by 4500 is no good. I'd try a set of stock actuators first.

[Dr_Drift]

byebye - Did I fit cam gears to your friends GTR? That will make a big difference..

I would suggest getting it tuned/diagnosed properly.

Sam.

[byebye]

byebye - Did I fit cam gears to your friends GTR? That will make a big difference..

I would suggest getting it tuned/diagnosed properly.

Sam.

Cam gears were already on it but you played with them, its the blue sparkly/dented one you tuned at munros before power cruise

The timing was out a little bit and has made it slightly more responsive

When are you coming back to tas sam? nath did ring you one day but you sounded busy, you said something about him being a pest haha

[PM-R33]

Stock gtr's are quite laggy for a factory car, doesnt sound like your mates car is stock if it makes full boost by 2500

Agreed.