Another 84 crossfire question
Thread Starter
Racer
Joined: Nov 2013
Posts: 338
Likes: 8
From: South NewJersey
Another 84 crossfire question
From what I understand a stock non ported X-fire system flows about 570 cfm So why wouldn't you be able to install it on a crate engine like the BLUEPRINT 355 CI with these specs for the top. it is advertised 310 hp and 360lbs tq. I know you wont get those results but.....
Cylinder Heads:
Blueprint premium center bolt cast iron
Hardened retainers and valve springs
2.02'' swirl polished intake valves
1.60'' swirl polished exhaust valves
Camshaft Specs:
Hydraulic Flat Tappet
Duration @ .050'' Lift: 229 Intake / 230 Exhaust
Lift: .480'' Intake / .486'' Exhaust
Cylinder Heads:
Blueprint premium center bolt cast iron
Hardened retainers and valve springs
2.02'' swirl polished intake valves
1.60'' swirl polished exhaust valves
Camshaft Specs:
Hydraulic Flat Tappet
Duration @ .050'' Lift: 229 Intake / 230 Exhaust
Lift: .480'' Intake / .486'' Exhaust
Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
From what I understand a stock non ported X-fire system flows about 570 cfm So why wouldn't you be able to install it on a crate engine like the BLUEPRINT 355 CI with these specs for the top. it is advertised 310 hp and 360lbs tq. I know you wont get those results but.....
Cylinder Heads:
Blueprint premium center bolt cast iron
Hardened retainers and valve springs
2.02'' swirl polished intake valves
1.60'' swirl polished exhaust valves
Camshaft Specs:
Hydraulic Flat Tappet
Duration @ .050'' Lift: 229 Intake / 230 Exhaust
Lift: .480'' Intake / .486'' Exhaust
Cylinder Heads:
Blueprint premium center bolt cast iron
Hardened retainers and valve springs
2.02'' swirl polished intake valves
1.60'' swirl polished exhaust valves
Camshaft Specs:
Hydraulic Flat Tappet
Duration @ .050'' Lift: 229 Intake / 230 Exhaust
Lift: .480'' Intake / .486'' Exhaust
Thread Starter
Racer
Joined: Nov 2013
Posts: 338
Likes: 8
From: South NewJersey
I do have a stock and a ported. my TBs are stock and I have orig. ECM. I guess my question is more general or maybe out of curiosity . that engine if u buy it dressed comes equipped with a 600 cfm carb on it . the xfire will flow 570cfm so that's only a 30cfm difference. What am I missing?
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
I do have a stock and a ported. my TBs are stock and I have orig. ECM. I guess my question is more general or maybe out of curiosity . that engine if u buy it dressed comes equipped with a 600 cfm carb on it . the xfire will flow 570cfm so that's only a 30cfm difference. What am I missing?
Tuning of the intake for cam. May be possible to adjust fuel psiand spark for new can but what guarantees do you have that it would work
Thread Starter
Racer
Joined: Nov 2013
Posts: 338
Likes: 8
From: South NewJersey
I guess my ignorance is in how the ECM controls spark. Because if the stock non ported manifold flows only 30 cfm less than the carb that Blueprint suggests to put on that particular engine how does the cam know if its coming from throttle bodies or a carb? I don't mean to beat a dead horse. just trying to learn .
Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
the xfire will flow 570cfm so that's only a 30cfm difference
B4 you invest $1000's in the car you own( I did) think of instead converting to a port mod injection system powered by EBL. I think the rewards are there. I run a Holley projection manifold with 7.4L TBI unit. I should have gone PF day one!
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway
I do have a stock and a ported. my TBs are stock and I have orig. ECM. I guess my question is more general or maybe out of curiosity . that engine if u buy it dressed comes equipped with a 600 cfm carb on it . the xfire will flow 570cfm so that's only a 30cfm difference. What am I missing?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Those intakes have a huge plenum they need more. Carbed much smaller plenum needs less.
Thats why you may see a tunnel ram with 2 large carbs. not that the heads/etc needs it so much, more the intake. hard to explain
Thats why you may see a tunnel ram with 2 large carbs. not that the heads/etc needs it so much, more the intake. hard to explain
Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
Here is info on flow tests(note one barrel comment):
http://www.candsspecialties.com/ratings.html
http://www.fordfe.info/CarbMythFact.html
http://www.candsspecialties.com/ratings.html
http://www.fordfe.info/CarbMythFact.html
Last edited by Rohn; Jan 3, 2014 at 11:29 AM.