first, Welcome to SV ...now, you say equal to a Holley contender? wow, haven t heard that name in a long while, they were discontinued ,.. ..thats not really saying much, since the Contender was crap after 4800-5000 rpm.. if you want to make big power, that Crossfire is gonna hold you back.the runners are just to small.... many have tried but none with great success that I know of..just my opinion, not trying to rain on your parade... we have one member that knows the XFire very well, Toobroke2Retire , and he gave up and bought a Renegade replacement.. good luck, keep us informed on your progress.. others may have different view
I need the advise of a crossfire expert?
I'm no newbe on racing engines, however the cossfire is a different animal. This is where I'm at 0.30 block [355cid] lightweight forged pistons & rods low drag rings, stock crank. FULLY ported intake [on flow bench = or above a Holley Contender] a later set of goodwrench heads FULLY ported, 1.94/1.60, Crane cam 440/454 w/ 1.6 ratio rockers block hugger 1-5/8 prim. headers I KNOW from my past racing engines this set-up will need at least 51mm TB's and 80lb/hr injector's CFM vs CID. The ?? are--will the old 82 ECM handle it? and will ONE f/p/reg. get the job done? Any help will be GREATLY apperciated!....Race on!!!
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Thanks Fish!
Yes I tried PM n Mr. Toobroke? Yes I know there limited I've got a T/Buick TI-SFI. I street/strip [10.56 @ 128mph 1/4 mile] I appreciate the input on this crossfire I've had it 13yrs. 75k on it ran great albiet-not fast. $$$ low and really just looking for about 350-375hp at the crank. I had it down at my [friends] speed shop and at the crank we got a best of [email protected] max hp 5500rpm [a lil lean] again at the crank, no air cleaners or acc's-355cid,> alot in lightweight pistons and rods low friction rings and a later set of goodwrench heads fully ported. I realize the H/Contender ran out about 5300. however AFTER many hrs of porting got the CF to flow a lil better[a lil]and NEVER will I port another CF! WHEW! Anyhow w/1.6 r/rockers & 440/454 cam f/p set at 15-16psi stock inj's were leaning out above 5000rpm's no matter where I set the f/p> 16psi was it--I expected that[the stock injer's are running past there duty cycle for this engine} I could leave it alone and back a lil BASE timing out of it and it would be ok [and not rev it past 5200] not wanting a race car just better performace. W/past builds CFM vs CID usually got me the right expected HP [providing a/f needs are met]. I need 80lb/hr inj's and 51mm TB's to get the tune right. I guess I have 2 questions will the stock ECM [I realize there slow]handle the 80lber's? and will one f/p/reg do it? Any and All input will be GREATLY appreciated! Thanks!.......race on!
Thanks Fish,first, Welcome to SV ...now, you say equal to a Holley contender? wow, haven t heard that name in a long while, they were discontinued ,.. ..thats not really saying much, since the Contender was crap after 4800-5000 rpm.. if you want to make big power, that Crossfire is gonna hold you back.the runners are just to small.... many have tried but none with great success that I know of..just my opinion, not trying to rain on your parade... we have one member that knows the XFire very well, Toobroke2Retire , and he gave up and bought a Renegade replacement.. good luck, keep us informed on your progress.. others may have different view
Yes I tried PM n Mr. Toobroke? Yes I know there limited I've got a T/Buick TI-SFI. I street/strip [10.56 @ 128mph 1/4 mile] I appreciate the input on this crossfire I've had it 13yrs. 75k on it ran great albiet-not fast. $$$ low and really just looking for about 350-375hp at the crank. I had it down at my [friends] speed shop and at the crank we got a best of [email protected] max hp 5500rpm [a lil lean] again at the crank, no air cleaners or acc's-355cid,> alot in lightweight pistons and rods low friction rings and a later set of goodwrench heads fully ported. I realize the H/Contender ran out about 5300. however AFTER many hrs of porting got the CF to flow a lil better[a lil]and NEVER will I port another CF! WHEW! Anyhow w/1.6 r/rockers & 440/454 cam f/p set at 15-16psi stock inj's were leaning out above 5000rpm's no matter where I set the f/p> 16psi was it--I expected that[the stock injer's are running past there duty cycle for this engine} I could leave it alone and back a lil BASE timing out of it and it would be ok [and not rev it past 5200] not wanting a race car just better performace. W/past builds CFM vs CID usually got me the right expected HP [providing a/f needs are met]. I need 80lb/hr inj's and 51mm TB's to get the tune right. I guess I have 2 questions will the stock ECM [I realize there slow]handle the 80lber's? and will one f/p/reg do it? Any and All input will be GREATLY appreciated! Thanks!.......race on!
Sorry for repeating the build on this engine.....>
atriot:
Again Thanks!Thanks Fish,
Yes I tried PM n Mr. Toobroke? Yes I know there limited I've got a T/Buick TI-SFI. I street/strip [10.56 @ 128mph 1/4 mile] I appreciate the input on this crossfire I've had it 13yrs. 75k on it ran great albiet-not fast. $$$ low and really just looking for about 350-375hp at the crank. I had it down at my [friends] speed shop and at the crank we got a best of [email protected] max hp 5500rpm [a lil lean] again at the crank, no air cleaners or acc's-355cid,> alot in lightweight pistons and rods low friction rings and a later set of goodwrench heads fully ported. I realize the H/Contender ran out about 5300. however AFTER many hrs of porting got the CF to flow a lil better[a lil]and NEVER will I port another CF! WHEW! Anyhow w/1.6 r/rockers & 440/454 cam f/p set at 15-16psi stock inj's were leaning out above 5000rpm's no matter where I set the f/p> 16psi was it--I expected that[the stock injer's are running past there duty cycle for this engine} I could leave it alone and back a lil BASE timing out of it and it would be ok [and not rev it past 5200] not wanting a race car just better performace. W/past builds CFM vs CID usually got me the right expected HP [providing a/f needs are met]. I need 80lb/hr inj's and 51mm TB's to get the tune right. I guess I have 2 questions will the stock ECM [I realize there slow]handle the 80lber's? and will one f/p/reg do it? Any and All input will be GREATLY appreciated! Thanks!.......race on!
atriot:
Contact me at [email protected] and I'll share my 25 years worth of CrossFire knowledge with you.
toobroke got me staighted out......>
and NOW I realize [duh] the STOCK reg/was not allowing any more fuel to the injectors....thats why the lean out was going on and my dum-a$$ was over at the dyno fuel station cranking the dam f/p up and getting no results?! [I feel a lil stupid however in my de-fence I was rushed only had 2 free hrs on the dyno from start to finish] and that was it! Toobroke got me straighted out and like I said my duma$$ did'nt even dawn on me about the stock reg....restricting the fuel..duh! Just for anyone else you won't need 80lb/hr inj's on a stock-crossfired intake engine you are CFM limited. I'm glad I DID not buy a set of 80lbers I'd a been drowning the car in fuel!
and NOW I realize [duh] the STOCK reg/was not allowing any more fuel to the injectors....thats why the lean out was going on and my dum-a$$ was over at the dyno fuel station cranking the dam f/p up and getting no results?! [I feel a lil stupid however in my de-fence I was rushed only had 2 free hrs on the dyno from start to finish] and that was it! Toobroke got me straighted out and like I said my duma$$ did'nt even dawn on me about the stock reg....restricting the fuel..duh! Just for anyone else you won't need 80lb/hr inj's on a stock-crossfired intake engine you are CFM limited. I'm glad I DID not buy a set of 80lbers I'd a been drowning the car in fuel!
I figured Toobroke could help you...hes the only one here that knows those CFI ..
1 - 7 of 7 Posts
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