78gts vs pt88 log comparisson
78gts vs pt88 log comparisson figured some looking at either turbo would be curious to see the actual responce time
this is a 370 with good heads, powerglide with tight converter, 3.08 rear gears, E50
take note of the TPS and MAP....... both rolling down the highway in high gear, same timing
gts
pt88
this is a 370 with good heads, powerglide with tight converter, 3.08 rear gears, E50
take note of the TPS and MAP....... both rolling down the highway in high gear, same timing
gts
pt88
yeah justin it is
picked up 2psi on the same WG setting
the weirdest thing is how much better traction i have on the street, has to be from the slower trasition from the start of positive manifold pressure to full boost
picked up 2psi on the same WG setting
the weirdest thing is how much better traction i have on the street, has to be from the slower trasition from the start of positive manifold pressure to full boost
yeah i bumped my fueling a bit to start and i will bring it back down, fueling is close bringing them into boost though so
and dont pay attention to the differences in injector DC, i have a higher base pressure now than i did with the gts log
and dont pay attention to the differences in injector DC, i have a higher base pressure now than i did with the gts log
well yes on my combo with a tight converter it is quite a bit laggier, if it was looser it may make a big difference, or throwing timing in it which i havent done yet. but yes overall quite a bit less responsive
it does hit the tires much nicer IMO though, my drag radials agree
on the trasbrake with the gts i could be in boost almost as fast as the throttle input.... with the 88 it takes me 3ish seconds at WOT to come up to 5psi...... same timing, same converter
but my converter is tight.... i hit WOT on the brake and it flashes to 2500rpm and has to build boost from there
it does hit the tires much nicer IMO though, my drag radials agree
on the trasbrake with the gts i could be in boost almost as fast as the throttle input.... with the 88 it takes me 3ish seconds at WOT to come up to 5psi...... same timing, same converter
but my converter is tight.... i hit WOT on the brake and it flashes to 2500rpm and has to build boost from there
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I am running the 76GTS now. I love how hard it comes on. The tires dont though. It it more than enough power for me but I was considering a PT88 upgrade if I ever got bored but I believe this is more than enough turbo as well.
Thanks.
Also thank you for the comparison I am sure alot more people were interested in this.
Thanks.
Also thank you for the comparison I am sure alot more people were interested in this.
thanks
yeah justin i just dont think the car was back halving right even on lower boost
not sure if it was from the smaller turbine with my higher overlap cam or what, you could just tell on the track it wasn't breathing right
at the track i would shift at 7k and it would drop to 6k on the shift... it would come out hard as ***** in low and then just feel lazy in high... with a good coupling converter too
i would hit 120 in the 1/8 and only 148-149 in the 1/4
see how this one does
yeah justin i just dont think the car was back halving right even on lower boost
not sure if it was from the smaller turbine with my higher overlap cam or what, you could just tell on the track it wasn't breathing right
at the track i would shift at 7k and it would drop to 6k on the shift... it would come out hard as ***** in low and then just feel lazy in high... with a good coupling converter too
i would hit 120 in the 1/8 and only 148-149 in the 1/4
see how this one does
ohhhh yeah, took it out tonight and leaned it out and maxed my 2 bar OS, yep.... thing is serious and seems to just be getting happy their..... tempt to swap to 3 bar
and worked on the transbrake tuning
works really well IMO now
car was sitting idling in my garage for a half hr after i got done out on the highway while i worked on the transbrake tuning, so that is why the IATs are so high...... but watch what the little bit of meth/water does when it only sprays for a second or two, haha
25* timing, 13.5~ AFR
http://www.youtube.com/watch?v=gdIl6...ature=youtu.be
and worked on the transbrake tuning
works really well IMO now
car was sitting idling in my garage for a half hr after i got done out on the highway while i worked on the transbrake tuning, so that is why the IATs are so high...... but watch what the little bit of meth/water does when it only sprays for a second or two, haha
25* timing, 13.5~ AFR
http://www.youtube.com/watch?v=gdIl6...ature=youtu.be
thanks
yeah justin i just dont think the car was back halving right even on lower boost
not sure if it was from the smaller turbine with my higher overlap cam or what, you could just tell on the track it wasn't breathing right
at the track i would shift at 7k and it would drop to 6k on the shift... it would come out hard as ***** in low and then just feel lazy in high... with a good coupling converter too
i would hit 120 in the 1/8 and only 148-149 in the 1/4
see how this one does
yeah justin i just dont think the car was back halving right even on lower boost
not sure if it was from the smaller turbine with my higher overlap cam or what, you could just tell on the track it wasn't breathing right
at the track i would shift at 7k and it would drop to 6k on the shift... it would come out hard as ***** in low and then just feel lazy in high... with a good coupling converter too
i would hit 120 in the 1/8 and only 148-149 in the 1/4
see how this one does
yes i agree shifting sooner may have helped, i just dont get to the track but a blue moon to see the actual difference
i would loose boost with the gts too
even on that log up above at only 12psi and a max of 6000rpm you can see it start dropping off
at trying to hold 15psi at 7k i am down a solid 2-3 psi, explain that one. what part of the combo is it?
maybe a combo of the good heads and bigger cam
dont get me wrong, i loved that turbo
but this new one is feels waaaay better at 15psi, no drop in boost for me now
i would loose boost with the gts too
even on that log up above at only 12psi and a max of 6000rpm you can see it start dropping off
at trying to hold 15psi at 7k i am down a solid 2-3 psi, explain that one. what part of the combo is it?
maybe a combo of the good heads and bigger cam
dont get me wrong, i loved that turbo
but this new one is feels waaaay better at 15psi, no drop in boost for me now
have you check back pressure on the hot side with either turbo to see if much difference?
the pt88 is a 80? what turbine vs the gt 76 turbo.
Im getting ready to tackle my car here real soon and im getting worried the pt88 isnt going to have a big enough turbine on a 365..
can you tell your cam specs
the pt88 is a 80? what turbine vs the gt 76 turbo.
Im getting ready to tackle my car here real soon and im getting worried the pt88 isnt going to have a big enough turbine on a 365..
can you tell your cam specs
yes i agree shifting sooner may have helped, i just dont get to the track but a blue moon to see the actual difference
i would loose boost with the gts too
even on that log up above at only 12psi and a max of 6000rpm you can see it start dropping off
at trying to hold 15psi at 7k i am down a solid 2-3 psi, explain that one. what part of the combo is it?
maybe a combo of the good heads and bigger cam
dont get me wrong, i loved that turbo
but this new one is feels waaaay better at 15psi, no drop in boost for me now
i would loose boost with the gts too
even on that log up above at only 12psi and a max of 6000rpm you can see it start dropping off
at trying to hold 15psi at 7k i am down a solid 2-3 psi, explain that one. what part of the combo is it?
maybe a combo of the good heads and bigger cam
dont get me wrong, i loved that turbo
but this new one is feels waaaay better at 15psi, no drop in boost for me now