http://www.youtube.com/watch?v=k8F6uVHf ... e=youtu.be
swapping out the cross fire intake for the FIRST TPI is a huge potential improvement , but its only one link in a chain and the WEAK LINK will limit the chains strength, or in this case the engines potential,
could you post more details on the engine components,used?
the 84 corvette has miserable restrictive heads and a very mild stock cam,the FIRST TPI intake is easily capable of feeding a 500hp PLUS engine , if the correct injectors are used, but the stock heads and cam and exhaust are VERY RESTRICTIVE
http://forum.grumpysperformance.com/viewtopic.php?f=55&t=10494&p=44284#p44284
http://forum.grumpysperformance.com/viewtopic.php?f=32&t=430
http://garage.grumpysperformance.co...-1985-corvettes-cold-start-9th-injector.2861/
http://garage.grumpysperformance.com/index.php?threads/ecu-functionality.10946/
the crane powermax 2040 cam is a great lower cost upgrade to a otherwise nearly stock TPI, or a manual transmission cross fire ,and about as large as you can go with an increase before it starts requiring mandatory other changes, even with the crappy stock heads its worth 25 hp in the crossfire and 35 in the tpi and it works with all the stock components without problems.
yes it works best with 3.54:1 -3.73:1 rear gears and an adjustable fuel pressure regulator , and 1.6:1 roller rockers,and long tube headers, but it FUNCTIONS and provides a noticeable boost,even without those components
YOUR CURRENT CRANE CAM
but with those trick-flow heads and the first intake yes you can use more cam, but remember a significantly larger cam will require a rear gear , like a 3.54:1-3.73:1 to stay in the preferred rpm band and higher stall speed converter , to instantly jump into that preferred rpm band (if its an auto trans) low restriction exhaust and headers ,and checking clearances and compression, if you want to maximize results
post as much info as you can think of concerning your car and engine build and I WILL RUN IT THRU MY DATA BASE AND SUGGEST SOMETHING, THEN YOU CAN COMPARE IT TO A FEW CAM COMPANY SUGGESTIONS IF YOU WANT TOO,,BUT IT WILL WORK !, Ive done this type of build for decades, and yes I,m the first guy to suggest you check with a couple cam manufacturers if your not sure, never take anyones word for anything without checking (thats only smart) but decades of experience does have some advantages
http://forum.grumpysperformance.com...&p=44284&hilit=first+tuned+port+intake#p44284
http://forum.grumpysperformance.com...&p=45447&hilit=first+tuned+port+intake#p45447
ONCE you do the math and look over the requirements and matching parts , youll find theres a reasonable range of cam lift and duration that you can expect to work, reasonably well and it falls in the 215-232 duration at .050 lift on the intake and between about 112-114 lsa with a bit longer duration ,on the exhaust lobe,WITH YOUR PARTICULAR COMBO AND REQUIREMENTS
this crower cam #00903
218/226 dur .462/.470 lift
will give you a noticeable boost in mid and upper rpm power WITHOUT a noticeable loss in vacuum for the brake booster, and its about the best choice if you choose to maintain max driveability,I,d suggest you don,t make the mistake of jumping up in duration on the cam significantly simply because youll loose drive ability on the lower rpms that you use all the time on the street far faster than youll gain peak power that youll rarely use very often. thats a very common mistake.
http://www.crower.com/camshafts/chevy-262-400-hot-street-beast-cam.html
the crane 113801 222/234 dur .467/.497 lift
this crane cam would split the difference and have some of the good and bad of both, it would give a bit more power but driveability would suffer in traffic
if you wanted to maximize power a crower 00232
230/238 dur .488/.501 lift
would boost the peak and upper rpm power more but at the cost of a very probable partial loss in vacuum for the power brakes , this is very similar too the duration of the crane roller cam I use in my 383, and its really great with a 200 shot of nitrous but its not ideal in traffic
READ THESE THREADS
http://forum.grumpysperformance.com/viewtopic.php?f=32&t=430
http://forum.grumpysperformance.com...&p=44299&hilit=first+tuned+port+intake#p44299
related links to cam catalogs
http://www.crower.com/media/pdf/2008b/19-66.pdf
http://www.cranecams.com/56-67.pdf
ray1979 said:its an 84 corvette with a TKO 600 and First TPi conversion. I still have the stock exhaust system. This weekend I am fitting hooker long tubs and a corsa cat back along with 1.6 roller rockers to try to squeeze 40 more hp out. I should see the dyno again in a few weeks after the test fit and ceramic coating.I have trick flow 23 degree heads and a crane powermax 2040 cam. I am also using the Bosch 3 24 lbs injectors. I think my cam is a bit to small so I want to use 1.6 rockers I currently have 3:54 gears and a TKO 600. I thought about changing to a different cam but not sure what to pick and still have great driving manors
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swapping out the cross fire intake for the FIRST TPI is a huge potential improvement , but its only one link in a chain and the WEAK LINK will limit the chains strength, or in this case the engines potential,
could you post more details on the engine components,used?
the 84 corvette has miserable restrictive heads and a very mild stock cam,the FIRST TPI intake is easily capable of feeding a 500hp PLUS engine , if the correct injectors are used, but the stock heads and cam and exhaust are VERY RESTRICTIVE
http://forum.grumpysperformance.com/viewtopic.php?f=55&t=10494&p=44284#p44284
http://forum.grumpysperformance.com/viewtopic.php?f=32&t=430
http://garage.grumpysperformance.co...-1985-corvettes-cold-start-9th-injector.2861/
http://garage.grumpysperformance.com/index.php?threads/ecu-functionality.10946/
the crane powermax 2040 cam is a great lower cost upgrade to a otherwise nearly stock TPI, or a manual transmission cross fire ,and about as large as you can go with an increase before it starts requiring mandatory other changes, even with the crappy stock heads its worth 25 hp in the crossfire and 35 in the tpi and it works with all the stock components without problems.
yes it works best with 3.54:1 -3.73:1 rear gears and an adjustable fuel pressure regulator , and 1.6:1 roller rockers,and long tube headers, but it FUNCTIONS and provides a noticeable boost,even without those components
YOUR CURRENT CRANE CAM
but with those trick-flow heads and the first intake yes you can use more cam, but remember a significantly larger cam will require a rear gear , like a 3.54:1-3.73:1 to stay in the preferred rpm band and higher stall speed converter , to instantly jump into that preferred rpm band (if its an auto trans) low restriction exhaust and headers ,and checking clearances and compression, if you want to maximize results
post as much info as you can think of concerning your car and engine build and I WILL RUN IT THRU MY DATA BASE AND SUGGEST SOMETHING, THEN YOU CAN COMPARE IT TO A FEW CAM COMPANY SUGGESTIONS IF YOU WANT TOO,,BUT IT WILL WORK !, Ive done this type of build for decades, and yes I,m the first guy to suggest you check with a couple cam manufacturers if your not sure, never take anyones word for anything without checking (thats only smart) but decades of experience does have some advantages
http://forum.grumpysperformance.com...&p=44284&hilit=first+tuned+port+intake#p44284
http://forum.grumpysperformance.com...&p=45447&hilit=first+tuned+port+intake#p45447
ray1979 said:
ONCE you do the math and look over the requirements and matching parts , youll find theres a reasonable range of cam lift and duration that you can expect to work, reasonably well and it falls in the 215-232 duration at .050 lift on the intake and between about 112-114 lsa with a bit longer duration ,on the exhaust lobe,WITH YOUR PARTICULAR COMBO AND REQUIREMENTS
this crower cam #00903
218/226 dur .462/.470 lift
will give you a noticeable boost in mid and upper rpm power WITHOUT a noticeable loss in vacuum for the brake booster, and its about the best choice if you choose to maintain max driveability,I,d suggest you don,t make the mistake of jumping up in duration on the cam significantly simply because youll loose drive ability on the lower rpms that you use all the time on the street far faster than youll gain peak power that youll rarely use very often. thats a very common mistake.
http://www.crower.com/camshafts/chevy-262-400-hot-street-beast-cam.html
the crane 113801 222/234 dur .467/.497 lift
this crane cam would split the difference and have some of the good and bad of both, it would give a bit more power but driveability would suffer in traffic
if you wanted to maximize power a crower 00232
230/238 dur .488/.501 lift
would boost the peak and upper rpm power more but at the cost of a very probable partial loss in vacuum for the power brakes , this is very similar too the duration of the crane roller cam I use in my 383, and its really great with a 200 shot of nitrous but its not ideal in traffic
READ THESE THREADS
http://forum.grumpysperformance.com/viewtopic.php?f=32&t=430
http://forum.grumpysperformance.com...&p=44299&hilit=first+tuned+port+intake#p44299
related links to cam catalogs
http://www.crower.com/media/pdf/2008b/19-66.pdf
http://www.cranecams.com/56-67.pdf
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