rc10gt tuning gone wrong...

[aj200415]

It runs ok in the low end and bogs in the high end. Its running about 265(i dont like that to much, but what is the highest temp i can go?) It idles ok, but the car will roll if i dont put brake on, but if i idle it any lower, it will die. I hit the gas and it takes of strong and is ok in the low end and mid, but crappy in the high(bogs out and dies) What is up?

 

[Monkey Wrench]

What engine you have in there, my man?

 

[aj200415]

well, i think its the factory associated .15. The reason why i think so, is because it has the EXACT same cooling head as the factory engine.

 

[HeartBreak]

265 is a little high for a smallblock. Too much exposure to that temperature range, and it could pop like a firecracker.

It sounds like your needles are out of alignment. Try opening the high needle about 1 full turn. That should get you in the ballpark. Next, on the idle opening, open it up about 1/4 turn on the screw. That should be more than enough to maintain a high idle, just so you can get the low end properly set.

 

[Candyman]

I'll start with the "return to factory settings" advice. My gut tells me both needles are out of whack. Better off just starting from scratch and going one needle at a time. Factory settings for the AE 15 are 2.5 turns out from base on the HSN and 2 to 2.5 turns out on the LSN.

 

[Monkey Wrench]

I'd also suggest sealing the backplate and carb throat with RTV sealant as well. May have an airleak in there.

Good luck!

 

[aj200415]

well i richened the high speed, and opened up the idle a little, and its doing muc better. Staying around 230 degrees.

 

[Nitro_Freak]

I was going to tell you to richen up the top-end, but you seem to have already done that.

in the future though, factory settings are the best way to start your tuning anew.