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08-28-2024, 06:26 PM
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#1 |
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Senior Member
 Join Date: Feb 2022
Location: Ca
Posts: 587
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First Outing
She fired right up, but the throttle bodies need some sync work. Once off idle it smooths out and AFR settles in nicely. When the plates are closed for idle, the sync becomes way more critical. A couple cylinders are to far closed and that jacks with the AFR which in turn confuses the computer and I get a 11 to 1 rich idle. For an off the shelf ECU and tune, FiTech is impressive technology. Think the venturi are a bit oversized. It's all in with vey little left after 1/2 throttle. I am going to experiment with different diameter stacks. Or maybe a eccentric throttle cable wheel. This is my first attempt with ITB on a 1st gen street engine. I had to add a few ports for sensors and additional vacuum lines and work out a remote idle control motor. Been a fun project as long as I remained true to my original expectations regarding Speedmaster. Their stuff is absolute crap but I got it at a super discount so I did not have high hopes. Many parts do not fit, and you have to add or modify things to make the parts work together correctly. But it looks cool.
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08-28-2024, 10:55 PM
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#2 |
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Senior Moment
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,172
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Re: First Outing
I Love the Look of Stacks. Nice job
__________________
1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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08-29-2024, 01:39 AM
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#3 |
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Registered User
Join Date: Oct 2009
Location: Denton, Texas
Posts: 1,729
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Re: First Outing
I agree, it looks very cool. I would be interested in knowing more about your set up.
What does the induction side use for air filtration?
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1968 C10 327, 3 speed manual, LWB stock height daily driver. 1968 C20 327, 4 speed manual, LWB stock height custom camper with heavy duty leaf springs rear, 50th anniversary edition. Hoping to press into daily drive status soon. |
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08-29-2024, 12:48 PM
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#4 |
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Senior Member
Join Date: Feb 2022
Location: Ca
Posts: 587
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Re: First Outing
There are a few different type of single filters for each stack or you can create a air box. I would not use this set up in dusty conditions. Any dirt roads would not be advisable without a box. I've not used the discs I have as yet. I need to air balance/sync the throttle blades better. I did this because I've always wanted one of these setups but the rules for the racing I did got in the way to some degree. The computers today are easier to work with so I thought I'd give it a try, with full knowledge that it could be a bit dicey for street manners. These things rock on the track, as part throttle applications are still rather heavy footed where this likes to live. Patience will be required to tune in some lower RPM manners. These things are not plug and play. I often see them on street kit cobras so I know they can work. I just need to learn how.
I got to say, I do like the look. |
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