Am I running out of air?

Jeff Parr /

bigbadbrother

Feb 03, 2020 01:47PM

Treats 70cc cylinder kit

Treats stuffed crank

Case matched

15mm bing clone 2.15 atomizer with #1 grandpa intake don’t remember the jet.

Treats hi compression head

PROMA circuit pipe

My problem is with four stroking at top end, I’ve gone up and down with jetting then went to the 2.15 atomizer that did help but I’ve still got the problem. So I’m wondering if I need a bigger carb-intake but here’s the issue is it will be going on a pinto and the frame might be in the way of the carb. So what do you think, More carb or ?. thanks for any and all help.

Re: Am I running out of air?

Dirty30 Dillon /

hydra

Feb 03, 2020 02:31PM

I had a similar issue, ended up being a bad trans seal/case seal that was allowing it to suck in ATF at higher rpms. This made is seem rich no matter my jetting, as the oil would foul it once it was pumping enough to suck it up from the trans res

Re: Am I running out of air?

pat splat /

ggspeed

Feb 03, 2020 02:32PM

carb size is fine, u need smaller jets, but... could be choke stuck on or float not closing off fuel inlet as well, or a super restrictive air filter.

Re: Am I running out of air?

Totally normal JBOT /

capturedbyrobots

Feb 03, 2020 02:37PM

Maybe your slide isn't opening all the way. It happens

Re: Am I running out of air?

EH 📣FCC of the QCB /

Go to branch

ericqcb

Feb 03, 2020 02:49PM

> Dirty30 Dillon Wrote:

> -------------------------------------------------------

> I had a similar issue, ended up being a bad trans seal/case seal that

> was allowing it to suck in ATF at higher rpms. This made is seem rich no

> matter my jetting, as the oil would foul it once it was pumping enough

> to suck it up from the trans res

Samzies.....is it smoking more than normal? Mine had a nice constant white smoke.....

Re: Am I running out of air?

Jeff Parr /

bigbadbrother OP

Feb 03, 2020 06:47PM

Jbot the slider is opening all the way. It did have a problem with a vacuum leak that I fixed but it might still have one, I'll try a propane enrichment test.