THEMADTYPH00N
Active member
Re: 051 bowtie block
I think he means with a bore that small it would kill the flow on the pontiacs.
sean said:
I think he means with a bore that small it would kill the flow on the pontiacs.
051 bowtie block
- Thread starter sean
- Start date
dgoodhue
BuSTeD 4.3
Re: 051 bowtie block
I don't have any experience with this myself, but using logic. I think he means if the chamber diameter on the head itself is 4.125, you don't want to use a 4.060 bore and have a small overlap of the block and chamber. I would think that would create havoc with the headgaskets as well.
I don't have any experience with this myself, but using logic. I think he means if the chamber diameter on the head itself is 4.125, you don't want to use a 4.060 bore and have a small overlap of the block and chamber. I would think that would create havoc with the headgaskets as well.
nightdiver
Active member
Re: 051 bowtie block
i used these heads with 4.030 JEs . No problem.
What mike wants to say is that with a such high cc intake port head you need cui in order to have decent vacuumm and flow/torque at low rpm.
I used a 3200 tc and i could overcome that stall speed and boost it over 12 psi (yes i got hydraboost,12,5 pbrs front /rear and 275/40/18)
With the extra cui and compression sean can use a bigger cam and a 2800 stall tc
i used these heads with 4.030 JEs . No problem.
What mike wants to say is that with a such high cc intake port head you need cui in order to have decent vacuumm and flow/torque at low rpm.
I used a 3200 tc and i could overcome that stall speed and boost it over 12 psi (yes i got hydraboost,12,5 pbrs front /rear and 275/40/18)
With the extra cui and compression sean can use a bigger cam and a 2800 stall tc