CR help...not a stupid question btw
You're telling me!
i need someone whose either done this or knows what their talking about to figure out how much boost we can SAFELY run with a 9.7:1 CR with the 383,then we'll know our next step.
i need someone whose either done this or knows what their talking about to figure out how much boost we can SAFELY run with a 9.7:1 CR with the 383,then we'll know our next step.
Originally Posted by ddnspider
You're telling me! i need someone whose either done this or knows what their talking about to figure out how much boost we can SAFELY run with a 9.7:1 CR with the 383,then we'll know our next step.
i need someone whose either done this or knows what their talking about to figure out how much boost we can SAFELY run with a 9.7:1 CR with the 383,then we'll know our next step. thats what im wondering,its obviously going to be intercooled as well to help but its my DD so....i was thinking since its a forged crank and stronger than the stock crank that it should be ok,but id rather be safe than sorry.i wonder what kind of rwhp #'s id be looking at with the 383 @15psi?
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by zamboxl
well i think cobras have a cr of 9.5 and there is a bunch of them running around with 15 pounds. The thing i dont know about is if that stroker from eagle is gona play a role or not.
Originally Posted by ddnspider
thats what im wondering,its obviously going to be intercooled as well to help but its my DD so....i was thinking since its a forged crank and stronger than the stock crank that it should be ok,but id rather be safe than sorry.i wonder what kind of rwhp #'s id be looking at with the 383 @15psi?
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Verdad Gallardo ive decided that this time around im doing things once and thats it,im not dealing with BS im getting serious.and the funny thing is i never go to the track,basically this is for me,cause i been working my *** off as i want this bad.i want to get a motor so my car is built for whatever i throw at it,has ZERO miles again so for resale WAY down the road(if i ever sell it) and is reliable and just insame to drive if i feel the need to use the skinny pedal.ill be the person whose at the track once every 6 months makes 2 passes on stock tires with stock suspension(except SFC and LCA's) and rip a high 10 pass with a 2.2 60ft and trap at 120+ and then cruise home in 6th gear at 1800rpms.
and then cruise home in 6th gear at 1800rpms.
Originally Posted by ddnspider
ive decided that this time around im doing things once and thats it,im not dealing with BS im getting serious.and the funny thing is i never go to the track,basically this is for me,cause i been working my *** off as i want this bad.i want to get a motor so my car is built for whatever i throw at it,has ZERO miles again so for resale WAY down the road(if i ever sell it) and is reliable and just insame to drive if i feel the need to use the skinny pedal.ill be the person whose at the track once every 6 months makes 2 passes on stock tires with stock suspension(except SFC and LCA's) and rip a high 10 pass with a 2.2 60ft and trap at 120+ and then cruise home in 6th gear at 1800rpms.
and then cruise home in 6th gear at 1800rpms. im leaning towards the 383 because of this
https://ls1tech.com/forums/dynamometer-results-comparisons/192630-dynograph-771rwhp-716-rwtq.html
post #12 about his CR,i realize that its a 427 with the best of everything but it has its similarities.im more of a low end driver(drop gears, or creep to 2k then step on it) so i think the 383 is the ticket.
https://ls1tech.com/forums/dynamometer-results-comparisons/192630-dynograph-771rwhp-716-rwtq.html
post #12 about his CR,i realize that its a 427 with the best of everything but it has its similarities.im more of a low end driver(drop gears, or creep to 2k then step on it) so i think the 383 is the ticket.
Originally Posted by ddnspider
im leaning towards the 383 because of this
https://ls1tech.com/forums/showthread.php?t=192630
post #12 about his CR,i realize that its a 427 with the best of everything but it has its similarities.im more of a low end driver(drop gears, or creep to 2k then step on it) so i think the 383 is the ticket.
https://ls1tech.com/forums/showthread.php?t=192630
post #12 about his CR,i realize that its a 427 with the best of everything but it has its similarities.im more of a low end driver(drop gears, or creep to 2k then step on it) so i think the 383 is the ticket.
Originally Posted by zamboxl
iam not sure but damn dude ur gona be going trough tires like crazy, 383 stroker is gona be a torquey motor, and ad a blower to that and ur gona be exploding tires of the line lol
HAHA!yeah me and ed are in cohoots for the same deal and i think we're both sold onb the 383.BTW zamboxl ill be on street tires and definitely a stock rear for awhile if not indefinitely.i wouldnt mind driving past a BPU supra like he was stopped,except this DARN Green 1 in town,lol
Originally Posted by ddnspider
HAHA!yeah me and ed are in cohoots for the same deal and i think we're both sold onb the 383.BTW zamboxl ill be on street tires and definitely a stock rear for awhile if not indefinitely.i wouldnt mind driving past a BPU supra like he was stopped,except this DARN Green 1 in town,lol
Really your engine builder should be able to answer this question for you pretty easy. 6.0 heads are plenty, if less compression is needed open up the chambers or go to a piston with more dish. Stay away from trying to go low with thicker head gaskets, not the way to do it when pushing boost from what i'm told. If you can't get an answer on your combo from your engine builder i'd consult with another.
J
J
Originally Posted by ddnspider
i did that and it came out to 9.28:1 which i could live with if thats correct.someone else try
383(4" stroke)
9cc dish
.03 deck height
.040 head gasket
72cc heads
383(4" stroke)
9cc dish
.03 deck height
.040 head gasket
72cc heads