Spark plugs and carb? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

J_PEPIN87 · 01-25-2010, 11:42 AM

Im almost finish putting together my 427bb and i have two questions.the first one,wat kind of spark plugs should i use?any part numbers.the engine is a 427 bored 30 over, 049 oval ports with 2.190/1.88 valves.trw dome top pistons @10 to 10.5 compresion,comp cams 292 magnum cam.the second one, im thinkin of goin with a proform 850 carb.summit part#67201 do yal think this is a good carb to go with?is it good size, too small or too big?

POPO1984 · 01-25-2010, 09:32 PM

damn bro nice set up. Did you build it.

J_PEPIN87 · 01-25-2010, 11:15 PM

Quote:

Originally Posted by POPO1984

damn bro nice set up. Did you build it.

Yeah I put it together and I had craig caulk da all the machine work.you've probably heard of him right?

gastrader35 · 01-26-2010, 01:08 AM

I would go with a holley street hp 950 it should work very good. I think the ngk race plugs work very good for $2.99 each. I have seen nothing but bad luck with the pro form carbs last one i seen had the boosters in crooked. Just my opinion stay away from the pro form carb. Good plug to start with if you use the ngk is 5673-7

gchemist · 01-26-2010, 02:19 AM

I use NGKs on a 10:1 compression ratio ZZ4. They work great!!

POPO1984 · 01-26-2010, 10:45 AM

Yeah Craig has done some heads for me on my 08 silvy. if i dont buy a crate engine i will probably get him to rebuild my current one.

J_PEPIN87 · 01-26-2010, 10:52 AM

Thanks a lot guys for the responses.anybody else have any opinions on the proform carbs?anybody running delco rapidfires?

J_PEPIN87 · 01-26-2010, 10:59 AM

Quote:

Originally Posted by popo1984

yeah craig has done some heads for me on my 08 silvy. If i dont buy a crate engine i will probably get him to rebuild my current one.

he also did my heads no porting though.

toms84ss · 01-26-2010, 11:35 AM

I've heard a lot of bad things about the Pro Form carbs. Stick with a name brand, you get what you pay for.

J_PEPIN87 · 01-26-2010, 01:17 PM

Quote:

Originally Posted by toms84ss

i've heard a lot of bad things about the pro form carbs. Stick with a name brand, you get what you pay for.

wow i thought proform carbs were pretty good i guess i was wrong.wat about quickfuel carbs?

djracer · 01-26-2010, 11:55 PM

buy a holley hp750. I don't like the quick fuels either. I might be able to get you a deal on one if you decide to go that way.

team39763 · 01-27-2010, 12:17 PM

I've read a few threads lately about pro-form and it sounds like their quality control is in the pooper. What about getting a custom carb?...like Braswell or ProSystems. I hear they can tune the fuel curve for your combo. That's what I wanted to go with, but for now I chose to keep messing with my current 750DP so I could learn a little bit on my own.

J_PEPIN87 · 01-27-2010, 12:35 PM

Well after hearing all this stuff about proform i think im going with a holley 4150 hp carb.still unecided on the plugs though.

01-25-2010, 11:42 AM	#1
J_PEPIN87 Registered User Join Date: Sep 2008 Location: PASADENA,TX Posts: 206	Spark plugs and carb? Im almost finish putting together my 427bb and i have two questions.the first one,wat kind of spark plugs should i use?any part numbers.the engine is a 427 bored 30 over, 049 oval ports with 2.190/1.88 valves.trw dome top pistons @10 to 10.5 compresion,comp cams 292 magnum cam.the second one, im thinkin of goin with a proform 850 carb.summit part#67201 do yal think this is a good carb to go with?is it good size, too small or too big?

01-25-2010, 09:32 PM	#2
POPO1984 Registered User Join Date: Jul 2009 Location: Houston, Tx Posts: 1,133	Re: Spark plugs and carb? damn bro nice set up. Did you build it. __________________ 1972 SWB Medium Olive South Houston Instagram: Antbish84

01-26-2010, 01:08 AM	#4
gastrader35 HOARDING SPECIALIST Join Date: Sep 2009 Location: SOUTH CHARLESTON OHIO Posts: 124	Re: Spark plugs and carb? I would go with a holley street hp 950 it should work very good. I think the ngk race plugs work very good for $2.99 each. I have seen nothing but bad luck with the pro form carbs last one i seen had the boosters in crooked. Just my opinion stay away from the pro form carb. Good plug to start with if you use the ngk is 5673-7

01-26-2010, 02:19 AM	#5
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Spark plugs and carb? I use NGKs on a 10:1 compression ratio ZZ4. They work great!! __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

01-26-2010, 10:52 AM	#7
J_PEPIN87 Registered User Join Date: Sep 2008 Location: PASADENA,TX Posts: 206	Re: Spark plugs and carb? Thanks a lot guys for the responses.anybody else have any opinions on the proform carbs?anybody running delco rapidfires?

01-26-2010, 10:45 AM	#6
POPO1984 Registered User Join Date: Jul 2009 Location: Houston, Tx Posts: 1,133	Re: Spark plugs and carb? Yeah Craig has done some heads for me on my 08 silvy. if i dont buy a crate engine i will probably get him to rebuild my current one. __________________ 1972 SWB Medium Olive South Houston Instagram: Antbish84

01-26-2010, 11:35 AM	#9
toms84ss Registered User Join Date: Nov 2006 Location: Arizona Posts: 121	Re: Spark plugs and carb? I've heard a lot of bad things about the Pro Form carbs. Stick with a name brand, you get what you pay for.

01-26-2010, 11:55 PM	#11
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: Spark plugs and carb? buy a holley hp750. I don't like the quick fuels either. I might be able to get you a deal on one if you decide to go that way. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

01-27-2010, 12:17 PM	#12
team39763 Registered User Join Date: Feb 2007 Location: Texas Posts: 469	Re: Spark plugs and carb? I've read a few threads lately about pro-form and it sounds like their quality control is in the pooper. What about getting a custom carb?...like Braswell or ProSystems. I hear they can tune the fuel curve for your combo. That's what I wanted to go with, but for now I chose to keep messing with my current 750DP so I could learn a little bit on my own. __________________ 1982 Silverado - SBE, cleaned up GM heads, small cam, TH350, 850 Demon, 4.56 gears, and caltracs. Best time so far 11.8@XXXMPH

01-27-2010, 12:35 PM	#13
J_PEPIN87 Registered User Join Date: Sep 2008 Location: PASADENA,TX Posts: 206	Re: Spark plugs and carb? Well after hearing all this stuff about proform i think im going with a holley 4150 hp carb.still unecided on the plugs though.



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