Amps1956

I need suggestions on a cam I have an l98 out of a vette I plan on running a tunnel ram on basically stock lower end and heads that came with it not looking for a big race car I doing mainly for looks and street not sure what a good cam selection would be I know the tunnel ram is not great for street it's got 2 4190 Holly's so not over carbed just want it to sound and look good I'm putting it in 87 bird I have extra hood so I can go back just wanted to run it any help is appreciated

F-BIRD'88

Not enough info yet.
Gears, converter stall.
Rpm range desired.

Flat tappet or roller cam?
Almost all hi perf hyd roller cams will need upgrades to the valvetrain to acommodate increased valve lift.
Springs, long slot rockers, etc.

I recomend using 2 Edelbrock 600 cfm carbs on your street tunnel ram.
A lot easier to dial in for a tunnel ram.

Amps1956

Not sure on stall that is something I should have asked i agree on your carbs but I have Holly's already so I will try them anyway I figured on springs didn't think about rockers so still looking for best combo will have a 700r4 behind it need to be able to drive it

F-BIRD'88

Melling #22280 hyd roller. the popular pac beehive springs + comp #787-16 retainer combo work well.
Will need long slot rockers or roller rockers.
Enough cam to make it fun and sound the part yet very street friendly.

Amps1956

Thanks for the info any suggestions on a stall?

8t2 z-chev

As I recall,1986 L98 had either 1 year only Aluminum heads(later production) or '624s(early '86 production )

F-BIRD'88

Converter stall:. More is better if you want to accelerate hard.
A 9.5" (245mm) converter is none too much.
( stall range 2800 4500 rpm)
A stock "Iroc" converter or a "S10" converter will work (298mm high stall). but a higher stall is better especially if you want a bigger duration cam. than the melling cam.

F-BIRD'88

If the heads are #462624 heads. don't expect much. These are VERY LAME HEADS.
Find a better cylinder head.

Amps1956

Thanks y'all for info so far I'm and old fart used to old small block with 202 heads and struggling to make 300 horses so any input is greatly appreciated

BOOT77

86 C4 was half iron n half alum, mine has the alum 128 heads. Make sure to get the right plugs for your heads, as parts stores will say short tapered And longer gasketed since it's a half n half year.

Amps1956

Well I found out my motor is a 85 not 86 so not special

BOOT77

Think I read the 85 had good pistons & crank, maybe forged. 128/113 alum heads weren't super great anyway, just decent But vortecs are better if you can find a not cracked set. L98 alum heads are like version1, LT1 heads version2 and vortecs the final version3. There are several not too expensive alternative modern design heads out there as well.

Since going street tunnel ram for looks/fun, I'd suggest a small runner good chamber heads like vortecs. The chamber design is just great for street and also small. Others may suggest 200cc or even other smaller aftermarket heads But for a 350 with a tunnel ram, I'd deff try to use vortecs and keep the compression up to have the best driveability. Summit vortecs(still not finished my video) are not a true vortec, they just have vortec bolt patterns But still a good Dart design, they just trade a bit of low rpm torque for more mid/high rpm HP

Far as cam, I still wouldn't know what would best work with a tunnel ram for looks & street. I'd suggest moderate, your asking the engine to do what the intake is not really designed for. Rear gear, comp, LT headers, stall, moderate cam & tuning.

8t2 z-chev

if the '85 corvette engine is original,it will have TRW forged flattop pistons for around 9:1 CR with the 76 cc '624 heads.The crank is cast iron,and there is a windage tray-corvette pan does not fit f-body. The forged pistons are early '85 production-cast pistons later.

Amps1956

so what can I do to use it ?

8t2 z-chev

replace the 'vette pan and oil pickup with standard pan meant for 1980-85 SBC-might need minor modification to pan or windage tray to fit.While pan is off,check the little plastic collar on the oil pump driveshaft to see that it has not gotten brittle and cracked.Also use a modern 1 pc oil pan gasket

Amps1956

Thanks for helping an old man out