Cross fire VS tuned port [READ THIS]
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Btw
Doesn't really matter. I would expect a high dollar built solid cammed 418 to be shifting in the 7k rpm range on the strip. That is converted single plane manifold territory.
At any rate, the point still stands. A properly build and tuned 418 would walk all over your mostly stock 350 cross fire build.
I almost get it now. You found a 15 year old magazine article that shows how a very optimized cross fire can run a decent time at the strip and decided to post about how you're using it as a basis for your build. I'm not sure why you have to rant about it though.
At any rate, the point still stands. A properly build and tuned 418 would walk all over your mostly stock 350 cross fire build.
I almost get it now. You found a 15 year old magazine article that shows how a very optimized cross fire can run a decent time at the strip and decided to post about how you're using it as a basis for your build. I'm not sure why you have to rant about it though.
And yes I applied that buid to my engine w/a few different mods. SINCE that was waaaay back in 1997 our tech and knowledge has advanced.....since then.
I should have never posted that POST cas dam! my intent was to HELP not ARGUE.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Did not realize I was ranting?
Did'nt just FIND an old mag. had it since [I bought my 82 IN 2000.]
And yes I applied that buid to my engine w/a few different mods. SINCE that was waaaay back in 1997 our tech and knowledge has advanced.....since then.I should have never posted that POST cas dam! my intent was to HELP not ARGUE.
And yes I applied that buid to my engine w/a few different mods. SINCE that was waaaay back in 1997 our tech and knowledge has advanced.....since then.
I should have never posted that POST cas dam! my intent was to HELP not ARGUE.
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
What do you think is the limit on horse power on a stock CFI intake? I love my CFI and I plan on keeping it when I install my 406 or I may do a 383 but I will be building for torque not horse power. I'm expecting no more than 5500rpm with over 400 ft lb of torque by 2800rpm 
PS, does M P stand for military police?
PS, does M P stand for military police?
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
I'd think that traction was some what of an issue. Theres another member dont remeber who that has 600 some horse and didnt do much better, but 60' was weak as well as the smoke trail out to the 1000' mark.
12 seconds is a quick street car, my daughters 400 horse 2011 mustang gt 5.0 runs 13.00 according to ford.
Last edited by bluedawg; Feb 12, 2013 at 12:20 AM.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I've heard about extrusion honing, opening between the runners to double the flow............................... I also have met people in love with their VW stroked out, hot cams, dual webers. But it all comes back to: What do you really have? I had a winning bracket racer low 12 second at 4500 feet 350 vette with a edelbrock carb.
All the chicks were over looking at the supercharged 8.50 second 69 Pro street camero!
All the chicks were over looking at the supercharged 8.50 second 69 Pro street camero!
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
limit of stock intake
What do you think is the limit on horse power on a stock CFI intake? I love my CFI and I plan on keeping it when I install my 406 or I may do a 383 but I will be building for torque not horse power. I'm expecting no more than 5500rpm with over 400 ft lb of torque by 2800rpm
PS, does M P stand for military police?
PS, does M P stand for military police?
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
crusinartvette
that help me a lot!!
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Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
extude honing?
I've heard about extrusion honing, opening between the runners to double the flow............................... I also have met people in love with their VW stroked out, hot cams, dual webers. But it all comes back to: What do you really have? I had a winning bracket racer low 12 second at 4500 feet 350 vette with a edelbrock carb.
All the chicks were over looking at the supercharged 8.50 second 69 Pro street camero!
All the chicks were over looking at the supercharged 8.50 second 69 Pro street camero!
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
383 vs 406 vs Crossfire
What do you think is the limit on horse power on a stock CFI intake? I love my CFI and I plan on keeping it when I install my 406 or I may do a 383 but I will be building for torque not horse power. I'm expecting no more than 5500rpm with over 400 ft lb of torque by 2800rpm
PS, does M P stand for military police?
PS, does M P stand for military police?
do alot of research 1st.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Yes it is
I agree.
I'd think that traction was some what of an issue. Theres another member dont remeber who that has 600 some horse and didnt do much better, but 60' was weak as well as the smoke trail out to the 1000' mark.
12 seconds is a quick street car, my daughters 400 horse 2011 mustang gt 5.0 runs 13.00 according to ford.
I'd think that traction was some what of an issue. Theres another member dont remeber who that has 600 some horse and didnt do much better, but 60' was weak as well as the smoke trail out to the 1000' mark.
12 seconds is a quick street car, my daughters 400 horse 2011 mustang gt 5.0 runs 13.00 according to ford.
BTW ,My SS truck now only weighs 4060lbs [below the stock weight of about 4400lbs-4500lbs]
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
12s is good period with a Crossfire I mean come on those were horrible manfolds lets face it. Followed by the most convoluted one ever the TPI.
Most guys grinding on their crossfires with converters are barely cracking 13s. Hell...12. something woulda spanked my 90 ZR1 and that put around 340 to the ground
Ive seen guys struggle with head/cam/Xfire lids and get mid 13s tops
Not bad at all.
Most guys grinding on their crossfires with converters are barely cracking 13s. Hell...12. something woulda spanked my 90 ZR1 and that put around 340 to the ground
Ive seen guys struggle with head/cam/Xfire lids and get mid 13s tops
Not bad at all.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Yes terrible manifold [stock]
12s is good period with a Crossfire I mean come on those were horrible manfolds lets face it. Followed by the most convoluted one ever the TPI.
Most guys grinding on their crossfires with converters are barely cracking 13s. Hell...12. something woulda spanked my 90 ZR1 and that put around 340 to the ground
Ive seen guys struggle with head/cam/Xfire lids and get mid 13s tops
Not bad at all.
Most guys grinding on their crossfires with converters are barely cracking 13s. Hell...12. something woulda spanked my 90 ZR1 and that put around 340 to the ground
Ive seen guys struggle with head/cam/Xfire lids and get mid 13s tops
Not bad at all.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Made me LAFF!!!!!!!
I agree.
I'd think that traction was some what of an issue. Theres another member dont remeber who that has 600 some horse and didnt do much better, but 60' was weak as well as the smoke trail out to the 1000' mark.
12 seconds is a quick street car, my daughters 400 horse 2011 mustang gt 5.0 runs 13.00 according to ford.
I'd think that traction was some what of an issue. Theres another member dont remeber who that has 600 some horse and didnt do much better, but 60' was weak as well as the smoke trail out to the 1000' mark.
12 seconds is a quick street car, my daughters 400 horse 2011 mustang gt 5.0 runs 13.00 according to ford.
YEP TRACTION IS AN ISSUE!!!!!Still laughing!!! To the point of tears!!!!
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Yes
12s is good period with a Crossfire I mean come on those were horrible manfolds lets face it. Followed by the most convoluted one ever the TPI.
Most guys grinding on their crossfires with converters are barely cracking 13s. Hell...12. something woulda spanked my 90 ZR1 and that put around 340 to the ground
Ive seen guys struggle with head/cam/Xfire lids and get mid 13s tops
Not bad at all.
Most guys grinding on their crossfires with converters are barely cracking 13s. Hell...12. something woulda spanked my 90 ZR1 and that put around 340 to the ground
Ive seen guys struggle with head/cam/Xfire lids and get mid 13s tops
Not bad at all.
:thumb s:
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Never had to replace it but its easy. Plenum comes off quicky below it are coil packs under that the starter. All the pertinent stuff is under the plenum theres no room under the car for anything. Try a waterpump on one of those 
Glad to hear youre happy with your results.
Something for everyone out there.
Glad to hear youre happy with your results.
Something for everyone out there.
Burning Brakes
Joined: Mar 2012
Posts: 871
Likes: 73
From: Memphis Tennessee
From my research the engineers at GM kinda/sorta used the old Cross-Ram intake putting 2/4 barrel carb's over the valve covers making high horsepower used on the hi-po 302/Z-28's cars [very rare] for an IDEA however they choked it up soooo much it is in stock configuration very limited, it AND the tbi's are too small for a 350cid engine. You gotta port the heck out of it to get it to flow enough air for a 350cid engine. ZR1's were very stong [never had one, friend in Fla. did] did ya every havta change a starter on your ZR1????
The Corvette crossfire was just a way to give the the Corvette fuel injection using four cylinder throttle bodys already developed at that time. One throttle body could not feed a 350, so they just developed a manifold that allowed the use of two.
When I was first planning my project, I really wanted a crossram. My thought was to use two 350 tbi throttle bodies on an offenhauser manifold, but I couldn't find any used and couldn't justify 500 bucks on just the manifold.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
I would like to see that done on a hotter or larger SBC. Long as you could tune to get past the plenum size I bet it would run good or would hope anyway. Perhaps aftermarket EFI to control it as they dont come alive til high rpm anyway? Sure would have some appeal popping the hood.
Burning Brakes
Joined: Mar 2012
Posts: 871
Likes: 73
From: Memphis Tennessee
The idea was to use it on a 400 I had at the time. I was planning on using a Megasquirt controller, as they can be programmed to run just about any combo. And though I couldn't find anyone that had ever tried it, I did find a case of dual tbi being used on an inline dual quad manifold.
Just thought it would be something different that would perform with junkyard parts.
Might have been better off with 2.8 or 4.3 throttle bodies to cut down on injector flow.
Just thought it would be something different that would perform with junkyard parts.
Might have been better off with 2.8 or 4.3 throttle bodies to cut down on injector flow.