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Author Topic: 301t Won't idle  (Read 12377 times)

Offline canadian nascar

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Re: 301t Won't idle
« Reply #15 on: May 24, 2011, 02:38:33 PM »
Hi,

so i put in the new accel pump, .135 needle and seat and took out the #77 jets and put back the stock #70s. now the response is good crusining  but as soon as i put the throttle down it hesitates 2-4 seconds and is fine there up. what do i do?

i am thinking i should try and put the #75 jets in to see what that will do?

the idle is excellent now

thankyou kevin
« Last Edit: May 24, 2011, 02:40:24 PM by canadian nascar »
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline canadian nascar

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Re: 301t Won't idle
« Reply #16 on: May 24, 2011, 05:30:49 PM »
i am working from recipe # 2 as instructed by Cliff

kevin
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline Cliff Ruggles

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Re: 301t Won't idle
« Reply #17 on: May 27, 2011, 04:58:25 AM »
Describe "put the throttle down"?  Going to full throttle from a standing stop, part throttle, heavy part throttle without the secondaries, etc?.....Cliff
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Offline canadian nascar

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Re: 301t Won't idle
« Reply #18 on: May 27, 2011, 10:34:38 AM »
Hi
going full throttle at any position, did some reading and tried adj. the secondary a/v spring tension and that fixed the problem.

tightend the screw 1/4 turn from where it was.

thankyou kevin
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline Cliff Ruggles

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Re: 301t Won't idle
« Reply #19 on: May 29, 2011, 04:33:15 AM »
Good news, and one of the best features of the Q-jet....FULLY adjustable for secondary airflap opening rate, without taking the carb apart!.......Cliff
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Offline canadian nascar

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Re: 301t Won't idle
« Reply #20 on: August 22, 2011, 06:54:04 AM »
Hi Cliff,
I am running #73 jets in the primary as called for in recipe #2, do you think they will be fine?

I have rich at idle because i was screwing around with the APT and I lost where i was which way do i turn the APT screw to lean out idle, light throttle.

thankyou Kevin
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline Cliff Ruggles

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Re: 301t Won't idle
« Reply #21 on: August 24, 2011, 06:53:27 PM »
Clockwise lowers the metering rods and leans it up....Cliff
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Offline canadian nascar

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Re: 301t Won't idle
« Reply #22 on: April 20, 2012, 04:00:53 PM »
Hi Cliff,

Well sir over the course I have finally have this this running great according to the wideband, it is a little rich at 10.5 though.

73's and the apt 2.5 turns up

This weekend I am going to install a modified turbo housings that is now a te-62,

thanks for all your help and parts that I have purchased from you

later Kevin
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline Cliff Ruggles

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Re: 301t Won't idle
« Reply #23 on: April 23, 2012, 03:17:22 AM »
More air will help it as far as A/F ratio.  Let us know how it works?....Cliff
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Offline canadian nascar

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Re: 301t Won't idle
« Reply #24 on: April 28, 2012, 05:43:06 PM »
How do I get more air ?

I thought I would have to change the secondary rods.

Kevin
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline Cliff Ruggles

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Re: 301t Won't idle
« Reply #25 on: April 30, 2012, 02:33:04 AM »
The modified turbo housing should increase air flow to the engine, more air and more boost, etc....Cliff
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Offline canadian nascar

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Re: 301t Won't idle
« Reply #26 on: April 30, 2012, 06:26:53 AM »
Hi Cliff,

So just put more boost, that's what you mean?

I thought there was a way to do it via the carb, opening the secondary flaps more.

Kevin
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline canadian nascar

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Re: 301t Won't idle
« Reply #27 on: April 30, 2012, 06:55:27 AM »
One good thing,

the cruising a/f was 12 with the old turbo then went to 16a/f at cruising with the new, turned the apt 1/2 a turn and put it back to 12.. nice

Kevin
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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline canadian nascar

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Re: 301t Won't idle
« Reply #28 on: May 22, 2012, 04:31:05 PM »
HI Cliff,

I called you last week about my wot a/f of 10 , could you expain again how to get more air via the secondary enrichment tubes.

to what I see there are 4 brass tubes attached to the air horn that slide into the main body which are the ones you mean? and going from 36-40 that means what.

thanks Kevin

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301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.

Offline canadian nascar

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Re: 301t Won't idle
« Reply #29 on: May 22, 2012, 05:54:10 PM »
Hi Cliff,

I am sorry but you told me that the float height and fuel pressure will affect the a/f also, I did some searches but couldn't find an explaination on these issues,?

my float height is 1/4'' and the pressure is 7psi

thankyou sir Kevin
Logged
301t,  8.5-1 comp, 262 comp cam, kb lw forged pistons, balanced crank, meth injection, 1.65 valves, roller rockers, 2.5'' dp, turbo exhaust wheel clipped 10degrees,   16lbs boost. dynoed 290whp, better tune scored est. 50hp more.
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