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Not Enough Power

GTSR22

By GTSR22,
in Victoria

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GTSR22 Experienced

GTSR22

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Posted
Putting 98 RON fuel should allow you to wind the boost up a bit higher before it starts to ping at all (much)..

why were you tuning the car on a mixture of 95/98?

it was tuned at bens and on his dyno got to 232rwkw, but on another it only got 212rwkw, the problem has been fixed now it seems that the stock boost is actually 12 psi so turning it up a bit should see the power go up,

thanks for your help guys and snowy

cheers

Beer Baron Grand Master

Beer Baron

Posted
Posted

R34 N1s are not the same as standards but just with steel wheels. They are very different on the exhaust side with .64 A/R rear housing compared to .48 A/R for the stockies. they also have different size and trim wheels, and a ball bearing centre and a built in seperater in the exhaust housing to seperate the wategate flow. There is no reason with 18-20psi and the right tune that you can't make 330rwkw+ with those turbos. The 34 N1s are very similar to a GT-SS. Some '34 N1s' i've seen also have a .60 A/R comp cover which makes them pretty close to a 2530. They are a pretty good turbo for a street GTR.

the question is: are you sure they are 34 N1s?

GTSR22 Experienced

GTSR22

Posted
  • Author
Posted
R34 N1s are not the same as standards but just with steel wheels. They are very different on the exhaust side with .64 A/R rear housing compared to .48 A/R for the stockies. they also have different size and trim wheels, and a ball bearing centre and a built in seperater in the exhaust housing to seperate the wategate flow. There is no reason with 18-20psi and the right tune that you can't make 330rwkw+ with those turbos. The 34 N1s are very similar to a GT-SS. Some '34 N1s' i've seen also have a .60 A/R comp cover which makes them pretty close to a 2530. They are a pretty good turbo for a street GTR.

the question is: are you sure they are 34 N1s?

yes we are sure, we have looked at them from undeneath and that is what was specified that was on the car. you can here them wind down they are definatley roller bearing.

Al Grand Master

Al

Posted
Posted

I would have thought that with R34 N1 turbos you would have no chance of reaching 300rwkw, unless you were running some rediculas boost, say 28psi :D , and this will probably be past their efficience range.

A descent set of cams would probably solve the problem :(

JAGR33 Grand Master

JAGR33

Posted
Posted

I think you'll find that 34N1's are similar to GT-SS's, and would comfortably make 300rwkw on 20 psi, I doubt it very much they'll reach 330rwkws unless your running cams, big boost and good fuel or do a run in shoot-out :( . Take into consideration each dyno is different, but going by what Ben tells me they're rediculously responsive down low but do suffer a bit up top.

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