NoPistons -Mazda Rx7 & Rx8 Rotary Forum - 1/2 bridge with Pettit Unlimited and piggybag

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- - 1/2 bridge with Pettit Unlimited and piggybag (https://www.nopistons.com/single-turbo-discussion-13/1-2-bridge-pettit-unlimited-piggybag-62007/)

0.5bridgeFD

10-04-2006 09:08 AM

hi ppl,

would a 1/2 bridge FD stay alive when the max is 15PSI with the following specs and mods:

- stock twins non-seq

- large Pettit ic

- open intake

- open exhaust

- Pettit Unlimited

- S-AFC II

- 2x850cc pri

- 2x1200cc sec

- Blitz Dual SBC

so i want to tune it for now with the Pettit and the S-AFC II. any ideas if this is possible?

searched here and 'there' but found nothing

villision 1revin7

10-05-2006 12:23 AM

Quote:

Originally Posted by 0.5bridgeFD' post='839542' date='Oct 4 2006, 06:08 AM

You should consider getting a single turbo with a 1/2 bridge motor

0.5bridgeFD

10-05-2006 06:04 AM

first with the twins, later a single yes!

GreyGT-C

10-05-2006 12:23 PM

i ran a 1/2 bridge (open intake and exhaust) w/ NS twins using a Haltec and 2 850's and 2 1600's with no problem. Not sure about using the 1200's though. As far as tuning it useing the afc and the pettit...... i don't see any issues. I would go bigger secondary injectors though.

0.5bridgeFD

10-05-2006 01:35 PM

GreyGT-C,

how was it with the stock twins and a 1/2 bridge?? did you like it or is the drivability bad?

villision 1revin7

10-06-2006 12:31 AM

You are chocking the exhaust using the stock twins

0.5bridgeFD

10-06-2006 01:55 AM

Quote:

Originally Posted by villision 1revin7' post='839811' date='Oct 5 2006, 09:31 PM

You are chocking the exhaust using the stock twins

?? don't understand what you mean?

villision 1revin7

10-06-2006 01:05 PM

You have big exhaust ports know. When using the stock manifold the exhaust can't breath like it would with a tubular manifold. I am just saying the stock twins is not a good combination with a half bridge.

0.5bridgeFD

10-10-2006 07:30 AM

ok thanks for the info, the twins are a temp setup until the single will go on, in the mean time the twins have to satisfy me https://www.nopistons.com/forums/pub...IR#>/smile.png

anybody else an opinion about my first post??

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