max safe TQ on a 427 TT
Thread Starter
Teching In
Joined: Jun 2002
Posts: 45
Likes: 0
From: Stavanger , Norway, Europe
max safe TQ on a 427 TT Peak TQ is also peak Cylinder pressure
Anyone know what max TQ on a 427C5R with 8:1 CR would be ?
Reason i ask is my setup is kind of high TQ low down and then drops off
as my turbos are not big enough to feed it properly at higher RPM`s
max RWTQ is 1036 @3600, then makes around 700rwhp
@ 6000 RPM is is down to 665 RWTQ, making around 750 rwhp
It is a fun daily driver and really kicks your butt when you gently press down the right pedal, even from low RPM`s :-)
But someone told me i has to be on a borderline when it comes to Cylinder pressure ?
Anyone know what that limit is on regular 94 octan fuel ?
TIA
Rune
Anyone know what max TQ on a 427C5R with 8:1 CR would be ?
Reason i ask is my setup is kind of high TQ low down and then drops off
as my turbos are not big enough to feed it properly at higher RPM`s
max RWTQ is 1036 @3600, then makes around 700rwhp
@ 6000 RPM is is down to 665 RWTQ, making around 750 rwhp
It is a fun daily driver and really kicks your butt when you gently press down the right pedal, even from low RPM`s :-)
But someone told me i has to be on a borderline when it comes to Cylinder pressure ?
Anyone know what that limit is on regular 94 octan fuel ?
TIA
Rune
what block do you have?
with that much power you just need schedualed matenance more.
id be looking to see if you could get a bigger AR exhaust housing if you cant upgrade the turbo size
with that much power you just need schedualed matenance more.
id be looking to see if you could get a bigger AR exhaust housing if you cant upgrade the turbo size
Thread Starter
Teching In
Joined: Jun 2002
Posts: 45
Likes: 0
From: Stavanger , Norway, Europe
Originally Posted by WS-Sick
This is somehwhat off-topic, but do you have any vids or pics (preferably vids) of your car that you can show us? 
it is for sale and it is in Norwegian
Mightymouse, it is a 4l60E FLP, level V trans.
and i live in Norway so it is not so easy to bring it to LPE :-)
Besides, everything workes very well, i dont see any knock, still manage 1036 rwtq, but was worried as someone claimed that was to high Cylinder pressure.
Smokinhawk, it is a C5R block, 8:1 CR, boost level is aprox 17 psi, but as RPM climbs turbos are not up for the full task and boost drop off to aprox 14 psi.
Thanks everyone for your hint
Rune
you should be fine with cylinder pressure, as long as your not getting knock, and the right AFR your engine will last a while.
do you know what turbos you have, i might worry about the back pressure issues.
do you know what turbos you have, i might worry about the back pressure issues.
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This may explain some questions about him using race fuel or alky injection.
hope you guys speak norwegian.
copied off his webpage "Alky injection kit for de dager man vil på strippen og dra ut noen hundre hester ekstra, uten å måtte fylle
Race fuel"
hope you guys speak norwegian.
copied off his webpage "Alky injection kit for de dager man vil på strippen og dra ut noen hundre hester ekstra, uten å måtte fylle
Race fuel"