WASTEGATE
#1
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WASTEGATE
I building a ls/v turbo and now i'm interested in know what will the difference be if i went with a 38mm wastegate compared to a 44mm? the turbo is a gt35r on a top mount mani fully built 2.0 ls/v would going with the 38 hurt me or be fine? will the 44 be better?
#3
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Re: WASTEGATE (zeimbo)
the 38 is gonna have some boost spike. one of my customers had a PT70 turbo on a 38mm gate w/ a 9 lb spring. the car was seeing 15-17 psi. we put a 44mm manifold and gate and also a 12lb spring and now the car was only spiking to 15 psi
on my 1.8LS/VTEC with a 44mm gate and 9lb spring, 44mm gate, im seeing 10 psi.... and occasionally 11 psi
on my 1.8LS/VTEC with a 44mm gate and 9lb spring, 44mm gate, im seeing 10 psi.... and occasionally 11 psi
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Re: WASTEGATE (Synapse Motorsport)
I am almost in the postion but i have already bought the 38mm and i already bought the topmount with a 38mm flange, i am running a gt35r also on a fully built gsr bottom end, I if i just run 12 psi with a boost controller will this work or what will most likely happen?
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#8
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Re: WASTEGATE (SilverCoupeEj8)
You DEFINETELY want to run the 44mm if you are running a gt35r. You'll have one hell of a time controlling low boost using a 38mm wg.
#10
Re: (bigbadboy)
yeah I think im starting to realize that as well. My 35-38mm gate has a 7.8 spring in it and im floating all over 10-11psi. You have to controll it with pedal pressure.
#11
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Re: WASTEGATE (ProjectBoosted)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProjectBoosted »</TD></TR><TR><TD CLASS="quote">I am almost in the postion but i have already bought the 38mm and i already bought the topmount with a 38mm flange, i am running a gt35r also on a fully built gsr bottom end, I if i just run 12 psi with a boost controller will this work or what will most likely happen?</TD></TR></TABLE>
if u wanna run 12 psi daily, then u should get like a 7-8 lb spring in the gate
if u wanna run 12 psi daily, then u should get like a 7-8 lb spring in the gate
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Re: WASTEGATE (boosted k20)
Its all relevant to the manifold, wastegate placement and turbine housing. If everything is really effiecent you will be able to run the 38mm without a problem, if the turbo setup is not efficent then you might need to go to a 44mm as a "band aid".
#13
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Re: WASTEGATE (miller)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miller »</TD></TR><TR><TD CLASS="quote">Its all relevant to the manifold, wastegate placement and turbine housing. If everything is really effiecent you will be able to run the 38mm without a problem, if the turbo setup is not efficent then you might need to go to a 44mm as a "band aid".
</TD></TR></TABLE>
Very true... I worked with one set-up that ran the full-race ramhorn style manifold with the tial 44mm wastegate. We even had an issue with that set-up making 3-4psi more than the actual rating of the spring. And as you guys know... full-race is one of the 'better' designed manifolds. It was pre-tear drop design.
</TD></TR></TABLE>
Very true... I worked with one set-up that ran the full-race ramhorn style manifold with the tial 44mm wastegate. We even had an issue with that set-up making 3-4psi more than the actual rating of the spring. And as you guys know... full-race is one of the 'better' designed manifolds. It was pre-tear drop design.
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Re: WASTEGATE (PrecisionH23a)
if hes not going to have a low boost setting than the 38 will be fine.
With a properly designed mani, i would say it will be able to hold 12-14PSI fine.
If ur not going to a have more than 1 stage to ur boost settings, and ur aiming for higher power(built motor) than the 38 will be good, just dont try to have a small PSI and be pissed when it doesnt hold.
With a properly designed mani, i would say it will be able to hold 12-14PSI fine.
If ur not going to a have more than 1 stage to ur boost settings, and ur aiming for higher power(built motor) than the 38 will be good, just dont try to have a small PSI and be pissed when it doesnt hold.
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Re: WASTEGATE (93supercoupe)
Your wastegate sizes should be determined by your turbo size and amount boost you are going to run.
In order to maintain a constant boost level the wastegate has to be able to divert enough exhaust away from the turbin to keep the wheel speed down.
I think with the 35R and staying above 12PSI the 38mm will be fine. I would say 15psi to really be safe.
In order to maintain a constant boost level the wastegate has to be able to divert enough exhaust away from the turbin to keep the wheel speed down.
I think with the 35R and staying above 12PSI the 38mm will be fine. I would say 15psi to really be safe.
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Re: WASTEGATE (mr2mitch)
well its going to be a peakboost topmount manifold.... and the motor will be sleeved,forged pistons,forged rods,etc. I plan on running at least 20 lbs this car isnt a daily and will on see really nice weekends and some track days
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Re: WASTEGATE (SilverCoupeEj8)
well if its not going to see small boost then the smaller gate is fine.
Its when u have traction issues, and u want to turn it down from 550HP to get going before 4th gear thats going to be a probleme.
Its when u have traction issues, and u want to turn it down from 550HP to get going before 4th gear thats going to be a probleme.
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