eduardocastrejo

Please help me to choose properly the camshaft


1991 L98 automatic 2.59 rear end

I already bought some parts

Mods

Trans and rear end

1.-2200 stall converter (bought it, not installed)
2.- 3.07 rear end (bought it, not installed)
3.- transgo (bought it, not installed) and oil cooler
4.- beam plates (bought it, not installed)
5.- speedo gears, red,green 92 sensor for 3.07 (bought it, not installed)
6- nitto treadwear 100 installed

engine

1.- Long tube headers installed
2.- no cats, doublé 2 1/4 exhaust to borla mufflers installed
3.- 3 wire heated 02sensor installed
4.- 1.6 rr self align installed
5.- stock L98 aluminum heads and stock 48mm throttlebody
6.- edelbrock ported base manifold (bought it, not installed)last purchased ítem


7.- lt4 springs (bought it, not installed)
8.- 30 lb injectors (bought it, not installed), I red that 24 is enough but pcmforless suggested 30lb
9.- walbro 255 fuel pump (bought it, not installed)
10.- k&n,cutted airlid,adjustable fuel pressure regulator installed
11.- msd 6al installed
12.- moates apu1 for fine tuning installed
13.-pcmforless chip not boughted until buy cam (baseline)
14.- egr, frisbie,airpump deleted


originally I wanted 180cc afr heads,268xfi cam and superram but im out of funds for this Project then I want to use the parts that I already have it.

superram difficult to found and expensive, then probably I will buy slp runners (ported)

heads, I will use stock heads unported,unmachined then .525 of lift is the limit, (maybe one day , I will (afr 180cc)

cam options: I want to use my 1.6rr

1.-lt4 hotcam with 1.6rr
24502586 218/228 .492/.492 .525/.525 112deg
probably to much for stock heads ,tpi, 3.07 gears
I red that valves float with lt4 spring then I will need other springs

2.- comp 264hr12 with 1.6rr
08-302-8 210/220 .480/.480 .512/.512 112deg
looks like a good cam for torque from 1500 to 5400
this cam with 1.6rr is like the comp 8-304-8 266 cam with 1.5rr


3.- cam suggestion ?, any advice ?

Johnny Blaze

iTrader: (15)

What cam does comp suggest?
I'm building similar, only with ported 083 heads, and ported stock base/ ported slp runners.
I am using a 501 series comp cam with 1.52 rockers.

Are tout machining the heads for the lift? I've always heard .480-.495 was the typical limit.

3rdgenZ

iTrader: (1)

with those gear and converter id go with the 210/220 comp. anything over 480 lift will require you to mechine the head for valve seal clearince.
sounds like a soild setup.

vetteoz

iTrader: (13)

You got a F-Body or a Corvette ????????????

Fill in your profile so people know what car you have

If you are talking about a VETTE L98 engine (on a 3rd Gen Forum )
then the factory alum 113 heads you have on your L98 will take the LT4/ZZ4 springs as a no mod , drop in fit
and give you the recommended spring that GM supplies in the LT4 cam and 1.6 rockers you seek to use.

Johnny Blaze

iTrader: (15)

I just figured "beam plates" was a funny name for subframe connectors?

A vette would explain the odd rear gear ratios too I guess.

eduardocastrejo

hi,
thanks for your answers
yes, c4 vette l98 113 heads stock
i already have the lt4 springs

vetteoz

iTrader: (13)

For your edumacation
http://www.zfdoc.com/c4beamplate.htm

(A problem F-Body owners don't have )