NoPistons -Mazda Rx7 & Rx8 Rotary Forum - How to do a full 4 port bridge w/ wide powerband and a lil streetable

NoPistons -Mazda Rx7 & Rx8 Rotary Forum (https://www.nopistons.com/)

- Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)

- - How to do a full 4 port bridge w/ wide powerband and a lil streetable (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/how-do-full-4-port-bridge-w-wide-powerband-lil-streetable-57183/)

JUst go all out bridge mines easy to drive a still has a nice powerband at around 7

Quote:

Originally Posted by Maccoretti' post='814467' date='Apr 17 2006, 05:32 PM

Sounds very similar to my motor - my bridge is longer with more hook but similar width.

I saw 209rwhp @ 8700 with 48IDA stock seals and 2.5" that merged into 3" after diff.

Idle is healthy 2600rpm and will not come down - feels very strong (like VTEC) post 4000RPM still drivable for street but waaaaaaaaaaay too loud and wont sit in traffic for over 3 minutes

A friend had an identical engine but with 12mm J-port and it was MUCH stronger (1.5 secs down 1/4)

Whay happens after 3 min.? Does it overheat? Foul plugs? I'm trying to learn the pro's and con's of each.

Thanls,

Billy

Quote:

Originally Posted by solo2er' post='817305' date='May 4 2006, 08:27 AM

Whay happens after 3 min.? Does it overheat? Foul plugs? I'm trying to learn the pro's and con's of each.

Thanls,

Billy

No matter how big your port is it should be able to sit for ever. unless it is overheating or its got colder race plugs which are fouling