Stumble when methanol kicks on.
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From: Sugar Land, Tx
Stumble when methanol kicks on. I have my methanol kicking on around 6psi and every time I get a stuffer out of it then it takes off. Where at in the tune can I pull fuel to compensate for this? Thanks for any help, Josh.
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From: South of Augusta,GA
You can also up the boost time you have it come on, I go until I see KR then back it down a lb or 2. I added a little timing to that spot to help it, that worked for me. I got 3spray nozzels, so it sprays a lot in mine. Try either one, and see what you like, the PCM sees the added fuel and pulls it to keep AFR in check, so pulling fuel may throw your tune off.
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From: Sugar Land, Tx
On the wideband its around 11.5 then of course when it kicks on it drops because of the stumble, but back to low 11's after that. I pulled a little out of the power enrichment and boost enrichment tables and a little out of the main ve as well. I also added 2 degrees of timing in these cells. I am gonna take it out and make a couple of hits and see what it does.
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On the wideband its around 11.5 then of course when it kicks on it drops because of the stumble, but back to low 11's after that. I pulled a little out of the power enrichment and boost enrichment tables and a little out of the main ve as well. I also added 2 degrees of timing in these cells. I am gonna take it out and make a couple of hits and see what it does.
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From: Sugar Land, Tx
I got it back at my house for the time being. The project car I had been working on for a customer is at the body shop so I have it back and doing some things to it. I made some changes to timing, fuel and methanol on time and F************************* this car will hurt you now. 
I put a small shot of nitrous on it. Turns on at 3000rpms and off at 4500rpms. 13psi 16 degrees of timing. I put some 325 50 15's on the back and it hooks hard and puts you in the seat.
I made some small fuel and timing changes and now it will hurt you it hits so hard. No more stumble. Thanks for the help.
I put a small shot of nitrous on it. Turns on at 3000rpms and off at 4500rpms. 13psi 16 degrees of timing. I put some 325 50 15's on the back and it hooks hard and puts you in the seat. I made some small fuel and timing changes and now it will hurt you it hits so hard. No more stumble. Thanks for the help.
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From: Sugar Land, Tx
TECH Fanatic
Joined: Jan 2010
Posts: 1,343
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From: South of Augusta,GA
I got it back at my house for the time being. The project car I had been working on for a customer is at the body shop so I have it back and doing some things to it. I made some changes to timing, fuel and methanol on time and F************************* this car will hurt you now. I put a small shot of nitrous on it. Turns on at 3000rpms and off at 4500rpms. 13psi 16 degrees of timing. I put some 325 50 15's on the back and it hooks hard and puts you in the seat.
I made some small fuel and timing changes and now it will hurt you it hits so hard. No more stumble. Thanks for the help.
I put a small shot of nitrous on it. Turns on at 3000rpms and off at 4500rpms. 13psi 16 degrees of timing. I put some 325 50 15's on the back and it hooks hard and puts you in the seat. I made some small fuel and timing changes and now it will hurt you it hits so hard. No more stumble. Thanks for the help.
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From: Statesville, NC
I have never experienced stumble and I got mine coming in at 7psi. Mine is not progressive so it comes on wide open with twin 10 pound nozzles spraying pure meth. Afr drops from 11.0 to 10.2 and holds 10.2 till I let out. Drowning it cause I'm 16 psi and stock bottom 2000 ls1. Lol