TBI 454 cam recommendations - Pirate4x4.Com : 4x4 and Off-Road Forum

LilWes278 · 12-11-2004, 02:30 PM

While my engine's getting rebuilt, I'm gonna take this opportunity to slap a mild (READ: smog legal) cam in it. I'd like to see what you guys suggest. It's basically a stock TBI 454 (but I'll probably put a chip in it later), anybody have any recommendations?

b454rat · 12-12-2004, 10:05 AM

I haven't done my TBI 454 yet, but a couple years ago I built a TBI 406 and used Comp Cams Xtreme Energy 268. I didn't trip any lights, and ran like a mother fucker!! I did use a High Energy 268 in a carb'd 454 in my old truck, and than ran real good. Would easily smoke the 35s with 3.73s in it. But I couldn't tell you on the emissions, they don't have that here, yet. Sorry.

Buckshot33 · 12-12-2004, 11:00 AM

hydraulic flat tappet or hydraulic roller? if its TBI it should be a roller but I wanna be sure.

What year is the block?

rodzzilla · 12-12-2004, 11:10 AM

TBI's were flat tappets. Hydro Roller's didn't start until the Vortec MPI in 96.

reddman · 12-12-2004, 04:55 PM

make sure to use a fairly mild cam, otherwise the thing wont run. tbi motors need a good vaccum signal to run, higher lift and shorter duration will net u the best results, more flow while maintaining driveabilty. my buddy put 2 hot a cam in his and the computers stock programed parrameters cant figure out why the thing wont read much of anything with the map sensor. and i know the small blocks went to roller hydraulic lifters about 1987, but im not sure when the bb's upgraded to roller.

Eagle-Mark · 12-12-2004, 05:15 PM

When your looking for a cam see if it has recomendations for TBI. Something like an RV cam.

Keeping the specs under 214o intake duration @ .050" and 224o exhaust duration @ .050" will still run with a TBI in most cases.

reddman · 12-14-2004, 09:30 AM

this man speaks the truth. if u want more power beyond that get rocker arms with a higher ratio, that will net u lift (read: flow) while maintaining vaccuum (read: it will still run). tbi 454s have terrible compression, like 7.5:1, have a machine shop face some off your heads to bump that up, it will help tons!

12-11-2004, 02:30 PM	#1 (permalink)
LilWes278 Registered User Join Date: Jan 2003 Member # 16733 Location: Turlock, CA Posts: 232	TBI 454 cam recommendations While my engine's getting rebuilt, I'm gonna take this opportunity to slap a mild (READ: smog legal) cam in it. I'd like to see what you guys suggest. It's basically a stock TBI 454 (but I'll probably put a chip in it later), anybody have any recommendations?

12-12-2004, 11:00 AM	#3 (permalink)
Buckshot33 Registered User Join Date: May 2004 Member # 31228 Location: Bakersfield Posts: 714	hydraulic flat tappet or hydraulic roller? if its TBI it should be a roller but I wanna be sure. What year is the block? __________________ '68 scout 800, TPI 383/700r4 D44's '66 K20 383/400/205 60/14 '62 nova 406/th350. 11.40's @ 118

12-12-2004, 11:10 AM	#4 (permalink)
rodzzilla Registered User Join Date: Jun 2001 Member # 5162 Location: If you drink enough, you will forget it is Iowa Posts: 806	TBI's were flat tappets. Hydro Roller's didn't start until the Vortec MPI in 96. __________________ "26 chicks all tied in a knot. Aint all good but it's what we got"

12-12-2004, 05:15 PM	#6 (permalink)
Eagle-Mark Web Wheeler For Hire Join Date: Feb 2004 Member # 26999 Location: North Idaho Posts: 1,116	When your looking for a cam see if it has recomendations for TBI. Something like an RV cam. Keeping the specs under 214o intake duration @ .050" and 224o exhaust duration @ .050" will still run with a TBI in most cases. __________________ *Addicted and Obsessed with Fuel Injecting Anything!* GearHead-EFI.com

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12-12-2004, 10:05 AM	#2 (permalink)
b454rat Registered User Join Date: Jan 2003 Member # 16536 Location: Binghamton, NY Posts: 2,464	I haven't done my TBI 454 yet, but a couple years ago I built a TBI 406 and used Comp Cams Xtreme Energy 268. I didn't trip any lights, and ran like a mother fucker!! I did use a High Energy 268 in a carb'd 454 in my old truck, and than ran real good. Would easily smoke the 35s with 3.73s in it. But I couldn't tell you on the emissions, they don't have that here, yet. Sorry.

12-12-2004, 04:55 PM	#5 (permalink)
reddman Registered User Join Date: Dec 2004 Member # 39492 Location: SL,UT Posts: 2,334	make sure to use a fairly mild cam, otherwise the thing wont run. tbi motors need a good vaccum signal to run, higher lift and shorter duration will net u the best results, more flow while maintaining driveabilty. my buddy put 2 hot a cam in his and the computers stock programed parrameters cant figure out why the thing wont read much of anything with the map sensor. and i know the small blocks went to roller hydraulic lifters about 1987, but im not sure when the bb's upgraded to roller.

12-14-2004, 09:30 AM	#7 (permalink)
reddman Registered User Join Date: Dec 2004 Member # 39492 Location: SL,UT Posts: 2,334	this man speaks the truth. if u want more power beyond that get rocker arms with a higher ratio, that will net u lift (read: flow) while maintaining vaccuum (read: it will still run). tbi 454s have terrible compression, like 7.5:1, have a machine shop face some off your heads to bump that up, it will help tons!