600 cfm holley on 12a streetport......
05-07-09, 01:08 PM
#51
When i hit the gas the car really takes off but sometimes it sputters slightly on higher rpm........ If I just got got done getting on the gas, like it still needs to fill the bowls back up. Thats why I'm first gonna change my line and see what happens. And another clue I don't know how to interpret is that it runs WAY better when it's raining and a little cooler. But as soon as it starts warming up it gets way worse.......
05-07-09, 02:48 PM
#52
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Have you checked the fuel pressure? Have you checked the float levels?
When it is raining and colder the air is more dense. Don't quote me on this but I think that means you are running rich. I could be wrong though.
When it is raining and colder the air is more dense. Don't quote me on this but I think that means you are running rich. I could be wrong though.
05-07-09, 11:41 PM
#54
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Well now I have two different theory's here........ one is to go down in size and the other is to go up....... Now heres some q's i need answered....... is my primary jet a 64 and my secondary is what size???? And theres only one jet for primary and one jet for secondary too right? And I thought when running you didn't want a ratio of more than 10 something? And you say your pv is 5.5 when mine is 64??? those sizes don't even match up..... So whats my game plan??!?!?! What should I do?!?!?!?!
05-09-09, 07:58 PM
#60
fpr regulator is too close to the carb, if you have the stock fuel pump you don't need the fpr, only move 2 jet sizes at a time, float adjustments are internal, you need to remove the bowls, and that fpr is crap (sorry). You cannot adjust the jetting in your secondaries unless you replace the metering plate with a different one every time or buy the qft plate http://www.quickfueltechnology.com/home_2.htm Next is the powervalve, do you know what to do with that?
05-09-09, 11:53 PM
#61
Yeah I know the reg is crap, it was alright on my other set up but I needed it for now cause I do have a LARGER fuel pump...... for the hundreth time! lol 
It quite large enough, 115 GPH at 7 psi and i tried running without the reg but it was just too much so I had to use mr gasket reg for now. I have a vac operated regulater I'm gonna install when I go 3/8, I have everything ready I just need to find a window of time to do it, which should be tomorrow. I was just gonna run a vac line from the carb to the regulator, that should work perfect right?
And whats the difference if the regs a foot from the carb or 5 feet from the carb? And i have no idea what to do with the powervalve.
We just picked up another 600 holley for free from a friend so I'm gonna take the jets out and see whats in it, if they're a bit bigger I'll try em and see how it runs. Where and how do you take the jets out?
It quite large enough, 115 GPH at 7 psi and i tried running without the reg but it was just too much so I had to use mr gasket reg for now. I have a vac operated regulater I'm gonna install when I go 3/8, I have everything ready I just need to find a window of time to do it, which should be tomorrow. I was just gonna run a vac line from the carb to the regulator, that should work perfect right? And whats the difference if the regs a foot from the carb or 5 feet from the carb? And i have no idea what to do with the powervalve.
We just picked up another 600 holley for free from a friend so I'm gonna take the jets out and see whats in it, if they're a bit bigger I'll try em and see how it runs. Where and how do you take the jets out?
05-10-09, 11:11 PM
#62
Update....... I installed the 3/8 line and my vac controlled pressure reg today. But the reg wasn't working corectly, it must have been letting too much fuel cause it was pushing past the bowls. So I had to resort back to the mr gasket reg... lol But now the car seems to act worse than before, just from the larger lines?!?! Is that possible? I have a return line. Either way i still need to install different jets....... FRUSTRATING!!!!!!!
05-11-09, 07:31 AM
#64
Can you locate a remote vac guage (hook a vac line up to the carb, and run the hose inside the car). Have a friend monitor the guage as you drive, I need to know idle, mild acceleration, firm accel, and full throttle results. Also, do you have the holley spring assortment for the vac secondaries??
05-11-09, 10:49 AM
#65
No, I haven't gotten the spring kit yet and I went back to my mr gasket reg like I stated before. It works pretty well but I would like to get another one soon. I'll try the vac trick this weekend maybe...... I'll try!
And I'll see if I can get pics of the reg too, if I can find my camera. lol
And I'll see if I can get pics of the reg too, if I can find my camera. lol
05-11-09, 01:42 PM
#66
Another update!!! Well I took apart the parts carb and removed the jet which were 66's! So as i was taking my carb apart to install them I noticed i didn't replace my cap for the port i was using for my vac reg. So thats why it got worse. So i progressed to installing the 66 jets and WOW! It's so much better!!!! It's such a relief!!! So I'm gonna invest in maybe two sizes bigger like a set of 68 and maybe a set of 70's too, just to tune it better. I'm still also gonna get the quick adjuster secondary diaphram cover.
05-11-09, 09:26 PM
#69
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600 cfm holley on 12a streetport
A 600 cfm holley is way to big for a 12a streetport dont get me wrong it will run but not as good as a smaller carb would . Bigger is not always better spend your money wisely and get a racing beat carb for your specific application.
05-11-09, 10:09 PM
#72
Yeah, The reg i was using for vac was for a boosted setup. lol I thought it would still work somehow but now that I think about it ........... Geeze.
And yes, spending my money wisely is what I'm trying to do. You know how much those racing beat carbs are alone?!?! The 600 was pretty much half the cost! I think I'll save myself the $300 and tune it myself and get the satisfaction and knowledge outta it. Even if I woulda bought one from them I still prolly would have had to do some adjusting odviously.
And the quick adjust diaphram cover is to make having to change springs one by one and disassembling the whole thing obsolete. This way you only have to twist the screw in the top of the cover to advance or retard the secondarys.
I thought it would still work somehow but now that I think about it ........... Geeze. And yes, spending my money wisely is what I'm trying to do. You know how much those racing beat carbs are alone?!?! The 600 was pretty much half the cost! I think I'll save myself the $300 and tune it myself and get the satisfaction and knowledge outta it.
Even if I woulda bought one from them I still prolly would have had to do some adjusting odviously. And the quick adjust diaphram cover is to make having to change springs one by one and disassembling the whole thing obsolete. This way you only have to twist the screw in the top of the cover to advance or retard the secondarys.
05-11-09, 10:53 PM
#74
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[QUOTE=risingsunroof82;9200524]Yeah, The reg i was using for vac was for a boosted setup. lol I thought it would still work somehow but now that I think about it ........... Geeze.
QUOTE]
if its a carb reg you should be ok just dont put the vac line on it.
if its a FI reg. sell it.
fwiw. im running a carb boost ref. fpr. im not getting boost yet and it works just fine. but with the vac line on the carb hat it will only see about 1-2 lb of vac.
more air so you need more gas for the right mix. i've got a 600dp but i would have got a 390 if it didn't cost an arm and a leg.
I thought it would still work somehow but now that I think about it ........... Geeze. QUOTE]
if its a carb reg you should be ok just dont put the vac line on it.
if its a FI reg. sell it.
fwiw. im running a carb boost ref. fpr. im not getting boost yet and it works just fine. but with the vac line on the carb hat it will only see about 1-2 lb of vac.