Newbie 21' scarab build
07-20-2015, 09:44 PM
#92
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Thread Starter
I need to post more pictures and videos I will this week just been busy. I put a power steering cooler on it and it's still getting rely hot. It's not smoking any more but I can't touch the hose Idk I'm gonna just keep running it.
I found out tho I'm not hitting the rev limiter tho. I'm either running out of fuel or floating the vavles. I bought a nice 750 Holley that has been gone thru by nickleson performance. Guy said it was on his 400hp 350sbc. My a/f gauge was reading 14.5 then would jump up to 15-16 at 5500 and start popping. I took the bowls off and primary was 74 I put in 77 the secondaries had 84 I put in 85. It's still Got the power valve in it. I ran it again and it's better in the low and mid range reading about 12 - 12.5 but as I increase rpms it leans out and starts popping and won't rev past 5500. I think I need a stiffer spring power valve? ??
The only thing I'm worried about is the lifters every thing in engine is new except for those. Comp cam valve springs. Will a lifter act up at a high rpm and cause this issue? I'm thinking it's fuel related because of what my a/f is saying. What y'all think? Thanks
I found out tho I'm not hitting the rev limiter tho. I'm either running out of fuel or floating the vavles. I bought a nice 750 Holley that has been gone thru by nickleson performance. Guy said it was on his 400hp 350sbc. My a/f gauge was reading 14.5 then would jump up to 15-16 at 5500 and start popping. I took the bowls off and primary was 74 I put in 77 the secondaries had 84 I put in 85. It's still Got the power valve in it. I ran it again and it's better in the low and mid range reading about 12 - 12.5 but as I increase rpms it leans out and starts popping and won't rev past 5500. I think I need a stiffer spring power valve? ??
The only thing I'm worried about is the lifters every thing in engine is new except for those. Comp cam valve springs. Will a lifter act up at a high rpm and cause this issue? I'm thinking it's fuel related because of what my a/f is saying. What y'all think? Thanks
07-21-2015, 07:18 AM
#94
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Thread Starter
Mallory marine 4140m pump with matching regulator. #6 line to a pre pump screen then pump then fuel water seperator. Then into the regulator. And I have a separate #6 lines coming out regulator for front and rear bowl.
07-21-2015, 07:07 PM
#95
Registered
-6 sounds small to me. I would use -8
What fuel pressure are you running?
Did you set the float heights?
sounds like your running out of fuel at high rpm
edit: -6 may work from regulator to carb, but is to small for a feed line
What fuel pressure are you running?
Did you set the float heights?
sounds like your running out of fuel at high rpm
edit: -6 may work from regulator to carb, but is to small for a feed line
Last edited by swiss; 07-21-2015 at 07:13 PM.
07-21-2015, 08:37 PM
#96
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Thread Starter
I haven't watched my fuel pressure. I did adjust the floats. I'm gonna run it again this weekend. I'll watch the fuel pressure. If it stays consistent I figure that would rule out the hose size? I agree -6 is small tho I just don't want to have to redo it lol. I'm gonna go try a stiffer power valve first. I think the air bleeds on this carb have been modded to I need to do some research and see how those work. The afr steadily leans out with the more throttle I give it....
07-21-2015, 08:43 PM
#97
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https://www.youtube.com/watch?v=Y3hZrW4Ryo4
https://www.youtube.com/watch?v=gag-Bg-X8cM
good stuff on these videos
https://www.youtube.com/watch?v=gag-Bg-X8cM
good stuff on these videos
07-21-2015, 10:34 PM
#98
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Thread Starter
This is the resistor needed to make the alternator charge. Its 470ohm 2watt just run a keyed on 12v to this then into the Brown wire going into the alternator and yr set
Last edited by 250ekelly; 07-21-2015 at 10:37 PM.
