pengaru

I'm assembling my motor with no sleeves and all matched ports, S4 manifolds. I plan to get it dyno'd also with this setup, then I will try with S4 & sleeves open, then S4 & sleeves actuated... I then want to do the same steps with all S5 port matched manifolds (I already have both). Some definitive information on this would be useful. Maybe adding pineapple inserts to the mess could be interesting too.

j9fd3s

yah, i like the pinapple inserts, they look really helpful



mike

mazdaspeed7

They help a lot. Maybe only a few hp at the power peak, but everywhere else its a night and day difference. Not to meniton it makes the engine accelerate so smoothly. Definately worth every penny.

Mazdatrix

??????? -- Sorry, I have been too busy to check forums in the last few weeks --



The only comments I made about "sleeves" (I believe on the "other" forum) was in a discussion about EXHAUST sleeves !! (and even there I stated more power with a modified EXHAUST sleeve versus NO exhaust sleeve).



The 6-port engines make better low end power with the INTAKE sleeves functional (closed). Therefore, the overall power/torque curve is better when they are functioning correctly -- closed at low rpm, open at higher rpm.

Baldy

which 2nd gens have 6-port sleeves, and which don't? I don't know if we're all talking about the same thing, but I thought I'd just throw this in here (pertaining to cat/air pump removal)

mazdaspeed7

All 6 port motors have them. All n/a's have 6 port mtors.

Baldy

oh...so if I get all pipe (no cats), ditch the airpump (it won't be needed, right?), I'll have to open up the 6 ports somehow, right? (wire them open?)

j9fd3s

the 84-88 engines use back pressure from the exhaust to open the ports, so you can ditch the cats and the air pump, on the 89-91's they use the airpump to blow the ports open, so you need to keep that



mike

j9fd3s

well we are dynoing um maybe during the week, or saturday

gsl-se battle!



mike

Apex13B

all of them do baldy