On our 2.0L engines with a GT42, on the road, in 3 rd gear, at which engine speed does the turbo make 15 psi? At which speed does the Gt42 build 22 psi?

 

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^+1

 

 

should spool like factory.....

 

i don't have a lot of experience with turbos that big but I'll tell you that its not gonna build that much boost very quickly, gt42r are monster turbos,

unless you use nitrous to spool it up or stroke the motor, adding twin scroll to the mix should help reduce spool up time

and theres always brake boostin lol

 

thanks a lot.

 

It will be done, just wait it out. There is always someone crazy out there.

 

lmao...should spool faster than a stock turbo

 

Probably not going to spool until over 9000.

 

+1

 

This has got to be one of the most random questions.... so I have to ask... WHY would you want to know these answers? Are you planning on a 1/4 mile dyno queen only car?

There are a lot of variables to take into account as far as what MPH will I be at @ 15psi, and at 22psi... such as... stock gearing? NOS? Ported head? which octane? Cams? Twin scroll or single? who is the tooner? and the list can go on and on... and on............ get it?

On a 2.0 liter... a 42R is a dumb choice....PERIOD... /discussion..


Ninja edit- If you are serious about this info, i'd say contact AMS, Buschur ect... the people with first hand knowledge about the 42R ect.

 

Not to jack the thread, can someone tell me when this turbo I am trying will start spooling?

 

A GT42 really doesnt run under 22psi, that is to say there is no point in running it under 22. On both of our 2.0L drag cars (non MIVEC) we are building boost by 6K (400+whp) with some minor boost being built by 5400 or so. On a X with dual MIVEC I think we can make it somewhat better but I am not sure that it will be substantial. I know the 3586 on my car (IX) spools by 5100 or so on a stock intake and on an VIII its 400rpm later in general.

The X MIVEC is pretty intense though and I have seen it spool 3582HTA about 300rpm faster than a IX. A 42R is just large and might not really see much gains (a few hundred rpm at most) realistically. Since no one has yet done it though its hard to say.

 

del eted