Good engine choice
01-04-2010, 10:20 PM
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Good engine choice Ok guy's i have a 85 gmc SWB with a 305/700r4 set up i want to go bigger .i want to have good power at the wheels and still have a DD .right now i have a 97 vortec 350 blk with the heads and a set of .30 over pistons i was planning on going with a xr288hr cam .would this set up be good or should i go a differnt way
01-05-2010, 07:38 AM
#3
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that's too much cam for a DD. plus you will have to re-work your heads to accept that much lift.
the xr268h is about as big as you wanna go. i was able to run this cam on a stock set of vortecs and it worked very nice, but the lift was really maxxing the heads.
the xr268h is about as big as you wanna go. i was able to run this cam on a stock set of vortecs and it worked very nice, but the lift was really maxxing the heads.
01-05-2010, 07:41 AM
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[QUOTE=big hammer;12706957]that's too much cam for a DD. plus you will have to re-work your heads to accept that much lift.
What would be a good cam for it it's gonna be some what of a daily driver i live 7 miles from work i just want to have a good motor with *****
What would be a good cam for it it's gonna be some what of a daily driver i live 7 miles from work i just want to have a good motor with *****
Last edited by 370 RAM AIR; 01-05-2010 at 07:42 AM. Reason: quote
01-05-2010, 07:45 AM
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[QUOTE=370 RAM AIR;12706960] remember not to over cam your engine. it's a common mistake by many new engine builders. the result is a poorly running engine and under performing
you may want to look at putting in a 2000-2500 stall torque converter while your in there
or just find a 400 small block and have the best of all worlds!
oh and if you use the 97 block, you're gonna need a new flex plate. the 1 piece rear seal crank wont accept the older 2 piece seal design crank flex plate
that's too much cam for a DD. plus you will have to re-work your heads to accept that much lift.
the xr268h is about as big as you wanna go. i was able to run this cam on a stock set of vortecs and it worked very nice, but the lift was really maxxing the heads.[/QUO What would be a good cam for it it's gonna be some what of a daily driver i live 7 miles from work i just want to have a good motor with *****
the xr268h is about as big as you wanna go. i was able to run this cam on a stock set of vortecs and it worked very nice, but the lift was really maxxing the heads.[/QUO What would be a good cam for it it's gonna be some what of a daily driver i live 7 miles from work i just want to have a good motor with *****
you may want to look at putting in a 2000-2500 stall torque converter while your in there
or just find a 400 small block and have the best of all worlds!
oh and if you use the 97 block, you're gonna need a new flex plate. the 1 piece rear seal crank wont accept the older 2 piece seal design crank flex plate
01-05-2010, 07:46 AM
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01-05-2010, 07:49 AM
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[QUOTE=big hammer;12706972]
remember not to over cam your engine. it's a common mistake by many new engine builders. the result is a poorly running engine and under performing
you may want to look at putting in a 2000-2500 stall torque converter while your in there
or just find a 400 small block and have the best of all worlds!
oh and if you use the 97 block, you're gonna need a new flex plate. the 1 piece rear seal crank wont accept the older 2 piece seal design crank flex plate i have a friend that has a 400 laying around give me some ideas for it
remember not to over cam your engine. it's a common mistake by many new engine builders. the result is a poorly running engine and under performing
you may want to look at putting in a 2000-2500 stall torque converter while your in there
or just find a 400 small block and have the best of all worlds!
oh and if you use the 97 block, you're gonna need a new flex plate. the 1 piece rear seal crank wont accept the older 2 piece seal design crank flex plate
01-05-2010, 01:10 PM
#10
Nope. Stock piston size in a 400 is 4.125.
The 400 with the vortec heads(make sure you have them machined for higher lift) and a XE274 (230/236) from comp will make a good lil street motor in that truck. You could put an XE268 (224/230) and be on the tamer side.
The 400 with the vortec heads(make sure you have them machined for higher lift) and a XE274 (230/236) from comp will make a good lil street motor in that truck. You could put an XE268 (224/230) and be on the tamer side.
01-05-2010, 01:13 PM
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What HP would u think i could get with the 400 and vortec heads
01-05-2010, 06:36 PM
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01-05-2010, 06:37 PM
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the 268 is almost too tame for a 400.. but good in a 350. the xe274 in a 400 would be just nice
01-13-2010, 04:38 PM
#16
No that was at the crank, but if I remember right that was on 87 octane. Let me do a lil research and I will post it up.
Edit: It was a Lunati BracketmasterII cam 230/230 480/480 lobe sep. 109. It made 490 hp at 5600 rpm and 529 ft lb at 4100 rpm
http://www.chevyhiperformance.com/te...ild/index.html
Edit: It was a Lunati BracketmasterII cam 230/230 480/480 lobe sep. 109. It made 490 hp at 5600 rpm and 529 ft lb at 4100 rpm
http://www.chevyhiperformance.com/te...ild/index.html
Last edited by 87silverbullet; 01-13-2010 at 04:56 PM.
