want to go 7.50 in the 1/8

[Twister79]

this is what iam building bbc 454 in a 86 cutlass T-top in stock trim no weight reduction mods

750 holley hp carb
performer rpm airgap intake
gm 3917215 heads
1.7 roller rockers
lunati voodoo cam 572/590 284/292
bottom end stock rebuild from an 87 suburban/ just new rings,bearings, andoil pump
flowtech headers
2800-3200 stall/ th350
3.73 gears
p275/60/15 drag radials

goal 7.50 in the 1/8
what do you think can i run that time or no even close

 

[big gear head]

I hope you are going to replace the 7.5 rear end with something stronger.

 

[Twister79]

this is what iam building bbc 454 in a 86 cutlass T-top in stock trim no weight reduction mods

750 holley hp carb
performer rpm airgap intake
gm 3917215 heads
1.7 roller rockers
lunati voodoo cam 572/590 284/292
bottom end stock rebuild from an 87 suburban/ just new rings,bearings, andoil pump
flowtech headers
2800-3200 stall/ th350
3.73 gears
p275/60/15 drag radials

goal 7.50 in the 1/8
what do you think can i run that time or no even close

the heads are 101cc oval port 427 vette heads the same flow as 049 and 781 heads

 

[454RAT]

sounds very doable with what you got. alot of factors will play into that, suspension, tuning, weather ect. but you should be able to get there no problem

 

[monzaz]

HEADS

Oh those 215 heads are not like the 781 or 049 heads.

The 215 heads are smallest open chamber head for big blocks THAT is a good thing for low end grunt 206 172 valves again good for low end and mid range performance you will be doing.

781 heads are 114-118 cc head chamber volume... You will loose compression with them and these were used in the emmision era of big blocks. They are good street heads But I will take the 215 first

049 heads are again larger cc combustion chamber heads 114-118 again BUT these have the some of the largest intake runner volumes of all the big block intermediate heads... So you have the highest potential for rev with stock components with the 049 again may be barely noticeable.

IF you had 100 or 200 dome I would take the 049 heads if you have flat tops I would take the 215.

Looks like you made a GOOD choice in heads.

If you want the most that combo will give AND the best ET you will need to bump the converter up one more level 3500 -3800 you need to pull at least a 1.55 -1.60 60 foot to probably get the ET you want.

REAR yes what is the rear you are running? CAuse that big block is going to do in the little 7.5 in short time. 350th could be next if it is not internally beefed to handle the smack of the big block and stick ezzz off the line.

I would have piced this cam better low end for track purposes and FUN TORQUE.

I do not think your going to have enough track to get the most from that cam. What will you be shifting at?
Voodoo Hyd Cam - Chevrolet Big Block 276/284
Product Description

Lunati's Voodoo series of Hydraulic camshafts deliver more area under the curve than any other series of Hydraulic camshafts. This means more throttle response, quicker acceleration, more vacuum, better efficiency, combined with maximum horsepower and torque!Hydraulic. Hot Street cam, likes 2800 converter, Hi-Rise type dual plane intake with 850cfm carb, headers, 10:1 compression and 3.73 gears. Likes up to 200HP nitrous.

* Advertised Duration (Int/Exh): 276/284
* Duration @ .050 (Int/Exh): 233/241
* Gross Valve Lift (Int/Exh): .554/.572
* LSA/ICL: 110/106
* Valve Lash (Int/Exh): Hyd/Hyd
* RPM Range: 2200-6400
* Includes: Cam Only

Part Number: 60204

Jobber Price: $138.20

 

[Twister79]

Re: HEADS

Oh those 215 heads are not like the 781 or 049 heads.

The 215 heads are smallest open chamber head for big blocks THAT is a good thing for low end grunt 206 172 valves again good for low end and mid range performance you will be doing.

781 heads are 114-118 cc head chamber volume... You will loose compression with them and these were used in the emmision era of big blocks. They are good street heads But I will take the 215 first

049 heads are again larger cc combustion chamber heads 114-118 again BUT these have the some of the largest intake runner volumes of all the big block intermediate heads... So you have the highest potential for rev with stock components with the 049 again may be barely noticeable.

IF you had 100 or 200 dome I would take the 049 heads if you have flat tops I would take the 215.

Looks like you made a GOOD choice in heads.

If you want the most that combo will give AND the best ET you will need to bump the converter up one more level 3500 -3800 you need to pull at least a 1.55 -1.60 60 foot to probably get the ET you want.

REAR yes what is the rear you are running? CAuse that big block is going to do in the little 7.5 in short time. 350th could be next if it is not internally beefed to handle the smack of the big block and stick ezzz off the line.

I would have piced this cam better low end for track purposes and FUN TORQUE.

I do not think your going to have enough track to get the most from that cam. What will you be shifting at?
Voodoo Hyd Cam - Chevrolet Big Block 276/284
Product Description

Lunati's Voodoo series of Hydraulic camshafts deliver more area under the curve than any other series of Hydraulic camshafts. This means more throttle response, quicker acceleration, more vacuum, better efficiency, combined with maximum horsepower and torque!Hydraulic. Hot Street cam, likes 2800 converter, Hi-Rise type dual plane intake with 850cfm carb, headers, 10:1 compression and 3.73 gears. Likes up to 200HP nitrous.

* Advertised Duration (Int/Exh): 276/284
* Duration @ .050 (Int/Exh): 233/241
* Gross Valve Lift (Int/Exh): .554/.572
* LSA/ICL: 110/106
* Valve Lash (Int/Exh): Hyd/Hyd
* RPM Range: 2200-6400
* Includes: Cam Only

Part Number: 60204

Jobber Price: $138.20

i will be shifting at 6600-6800 rpm

 

[big gear head]

What rear end will you have in the car?

 

[TNTS79]

That seems like a lot of RPM on a just a stock rebuild gm bottom end... I wouldn't spin it any higher than 5500-6000 and pick a cam with less duration like what others have suggested... Hope you have a new rear end in the works, 8.5/12 bolt/9" etc...

 

[Twister79]

That seems like a lot of RPM on a just a stock rebuild gm bottom end... I wouldn't spin it any higher than 5500-6000 and pick a cam with less duration like what others have suggested... Hope you have a new rear end in the works, 8.5/12 bolt/9" etc...

i thinking about puting a set of scat rods in it and iam going to run a ford 8.8 rear
what cam do you guys suggest

 

[Twister79]

are the bbc 3917215 heads the same as the 3931068 heads if not what is the difference