kowboy59

iTrader: (8)

okay so i took my car finally to the track withe the new cam intake and mildly ported gasket matched heads,

freakin car ran the same damn time as it did before.

i thought maybe the tranny may be messed u because the motor feels stronger.

i shift now at 7k rpms wth the tranny and it seemed the trany was acting a lil weird up there. like a delayed shift or something like it.
when i shifted at 6500 the next pass it did much better.

the tranny is a stage 2 performabuilt and im wondering if theres too much rpm for a 700r4 orrr could it be building too much pressure that high and i need to lower it

Shagwell

Very unlikely to be "too much" pressure. There isn't really such a thing at high rpm. At 7k you may be cavitating a 10-vane pump. Not sure if their "stage 2" has the 13-vane or not, but at that kind of RPM you are leaning on the stock stype 10-vane.

How big of cam you running? Did you increase the spring pressure to handle the increased rpm?

As for not lowering your times, there are many variables at play. Same 60ft? Same launch rpm, same air tmep, track temp, humidity, etc? Is the new cam and port flow still in sync with the converter and gear ratio you're running?

kowboy59

iTrader: (8)

what spring pressure are you referring too?

yes the humidity here was the worst of the year and barometric was 0, however the cam is a custom grind to my app. intake is victor jr gasket matched to my heads.

old cam was 230/236 510,520 and new one is 240/246 560/560

track prep was crap but i did manage same 60'. im going tomorrow to hopefully do better

vipershark11

iTrader: (6)

hes talking about the valve springs to see if they have enough pressure and are not floating way up high in the rpms that your motor sees. also shagwell i believe the stage 2 performabuilt has a 10 vane pump then the stage 3 steps up to a 13. I remember hearing it that these transmissions are not meant for high rpm usage but thats just hearsay but i would look into it because the tranny could very well be holding you back or it could be the tune on your new combo.

Orr89RocZ

iTrader: (20)

you probly dont need to shift that high anyway with that motor. I'd stay between 6500-6800.

your valve springs are probly not strong enough. I'd run 160-170lbs on the seat for that cam if its a hydraulic roller

kowboy59

iTrader: (8)

Valve springs are stron enough. even added some pressure to them. Tey can handle a 716 lift.

Also I have a thing called the AFR hydra rev kit.

Car is carbed so no tuning really. I need to mess with some timing. not too sure what all it could be. I have an afr gauge and it was saying 12.6-7 region. it prolly could be leaned out but i need to make sure this tranny is screwing me.

Motor was gone through by prolly best motor builder/ machinist in the central florida region

Pro Built Automatics

When going over 5,500 rpm, you will need a different priming spring to keep up the pressure. TransGo offers different priming springs for different applications. One for up to 5,500 rpm, and another for up to 7,800 rpm. I have one for 7,800 rpm in Rick Abare's mid nine second Firebird for the past few years. I use the 10 vane in this setup also. He shifts at 7,300 - 7,500 rpm with no problems. Go to http://www.advancedinduction.com/ to see some of Rick's runs. His 60 foot times are 1.24 - 1.28. The 13 vane requires an original 13 vane (back half of the pump) to work correctly. Going to a 13 vane in an original 10 setup does nothing but take away oil volume. I have another person shifting at 8,400 rpm, the last I heard still going strong, 10 vane also, and this uses a custom duel spring setup to do that. Dana

Orr89RocZ

iTrader: (20)

Thats weird, i never had a problem with mine shifting it at 6500-6800. I'm not sure what spring i have in mine tho

Shagwell

great info Dana, as always. I have personally never run a 13-vane set-up yet, I guess now I have more reason not to worry about it. Definitely right on about the spring, I hadn't though of that as I always use the Superior kit while building a trans.

kowboy59 - the rev kit does nothing for valve float(maybe a little on a hyd cam). A rev kit keeps the lifters on the cam lobes at all times, the valve spring still does the job of closing the valve. Just because you have the coil height to run a .716 lift does not mean you have the proper seat pressure to do so. - For a NA motor that afr doesn't sound bad if you're saying thats the reading at WOT. - a 240/246 duration cam is not making power at 7k. 6500-6800 range should cover you.

How much stall is the converter rated at? That kind of duration and a single plain intake won't like much of anything below 3k. - Also, I realize you already have the single plane, but a RPM air-gap would make more power at that rpm level.

Mostly curiousity here - what heads and what type of cam(flat tappet/roller, hyd/ solid)?

kowboy59

iTrader: (8)

Well i shifted at 6900rpm and went 11.7 at 117.

I can fatten it up some more and bump a degree or two of timing in it..

Tranny is doin great.

Cam is custom grind 240/246 560 560 at 110 lsa.

heads flow 275cfm with intake. intake is victor jr.

my stall is 3500.
my valve spring is rediculously fine.

We increased it and also checd it to make sure.
The cam was made for the heads iintake nitrous valve springs gears and exhaust i have