TBI cam ???

[narizon]

Hey guys,I'm looking for a performance cam kit 4 my 89'TBI 350 2wd 700r4. Truck runs great,just want some more performance out of it.More HP/torque always sounds good.Checking out COMP CAMS XE268H
224/230@.050 intake and exhaust.Have already picked up 1.6 rollers.I like that slope sound but what do you guys think?Will this cam work for me?Any other suggestions?I live in CA so smog is also of importance.
Thank you

[Adum]

check this for good upgrades
http://tbichips.com/truckmods.htm

RECOMMENDED CAMS

I have removed the Summit racing cams recently due to a lot of lifter issues with these cams.

Crane cams
Summit Part Number: CRN-113904
Basic Operating RPM Range: 1,500-4,500
Duration at 050 inch Lift: 206 int./218 exh.
Advertised Duration: 256 int./268 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.432 int./0.459 exh. lift
Lobe Separation (degrees): 112


Summit Part Number: CRN-113932
Basic Operating RPM Range: 1,600-5,200
Duration at 050 inch Lift: 210 int./216 exh.
Advertised Duration: 266 int./272 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.440 int./0.454 exh. lift
Lobe Separation (degrees): 114

Summit Part Number: CRN-113934
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,600-5,200
Duration at 050 inch Lift: 212 int./218 exh.
Advertised Duration: 262 int./268 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.446 int./0.459 exh. lift
Lobe Separation (degrees): 114

Edelbrock cams

SummitPart Number: EDL-3702
Basic Operating RPM Range: Idle-5,500
Duration at 050 inch Lift: 194 int./214 exh.
Advertised Duration: 244 int./264 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.398 int./0.442 exh. lift
Lobe Separation (degrees): 112

Summit Part Number: EDL-2102
Basic Operating RPM Range: Idle-5,500
Duration at 050 inch Lift: 204 int./214 exh.
Advertised Duration: 278 int./288 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.420 int./0.442 exh. lift
Lobe Separation (degrees): 112

Lunati cams

Summit Part Number: LUN-60100LK
Basic Operating RPM Range: 1,000-5,500
Duration at 050 inch Lift: 207 int./213 exh.
Advertised Duration: 250 int./256 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.437 int./0.454 exh. lift
Lobe Separation (degrees): 112


Summit Part Number: LUN-60101LK
Basic Operating RPM Range: 1,000-5,500
Duration at 050 inch Lift: 213 int./219 exh.
Advertised Duration: 256 int./262 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.454 int./0.468 exh. lift
Lobe Separation (degrees): 112

Cheapy Sealed Power cams

CS1014R
1500-4000 RPM Range
278 intake/288 exhaust Adv Dur
Duration @.050 204 intake/214 exhaust
Valve lift 420 intake/443 exhaust,
Lobe C/L 112
Strangely this cam has the exact same specs as a Summit 1102 HMM wonder who makes Summits Cams, Also looks exactly like the Edelbrock 2102 cam.

CS1105R
1800-4400 RPM Range
283 intake/286 exhaust Adv Dur
Duration @.050 209 intake/216 exhaust
Valve Lift .435intake/.455 exhaust
Lobe C/L 112

I haven't tried this cam yet but I may give the 1105R a try on project Plum Simple

Also Northern Autoparts Northern Auto Parts has the sealed power cams complete with timing chain and gears as well as the cam and lifters as a kit for under $100. Can't beat that for a budget build.



COMP CAMS


As you can see below as the duration gets higher so must the lobe separation angle.



Choose one that provides the rpm range that you want your engine to run in. For you 93-95 TBI trucks, I can set the rev limiter to match the redline of those cams and the 4L60E automatics, I can set the shift points to match the powerband of those cams. All 87+ cars got roller cams but the trucks didn't get one until 1996 (Vortec). The trucks have all the provisions for the roller equipment but just didn't get the parts.

Part list for converting to roller cam should you want to go that route.

GMPP P/N 12371043 = timing chain/gears and roller cam retaining plate kit (1st and 2nd design plates!)
GMPP P/N 12371042 = 2nd design (higher ball preload) roller lifters (16) with (8) lifter aligners and (1) spider hold-down and (3) spider attaching bolts/washers.
GMPP P/N 10457356 = Distributor gear for use with roller camshaft.

[Justv610]

I would go with either a comp cams, or crane cams. Hear alot of ppl run the lunati's also.

[lowriderbowtie]

I think if you want to keep it computer friendly, you dont want your lobe seperation more than about 106*

or maybe I understand it wrong...

[2500ak]

iirc

lower LSA = more overlap where both valves are open at the same time. It helps with scavenging in the high rpms, but it causes reversion in the low end and that upsets the computer.

Wide LSA will let you run higher durations with less overlap, but iirc it lowers compression and can make the engine lazy in the low end / mid range. Most forced induction cams have wide lsa and high durations

Really tight LSA with low durations will concentrate power in the low end / low-midrange but won't be able to breathe up top

large durations and tight LSA will concentrate power in the really high rpms and usually you have to get a much higher stall or have a stick shift to run these with any kind of driveability.

Stock cams tend to have wide lsa and low durations, for emission purposes.

[1BAD94]

im runing a crane cam 216/228 .454/.480 valve lift at 112 lsa but mine is hydraulic flat tappet im gessing you have roller rockers

[narizon]

no i also have hydraulic flat tappet,and yes I need something computer friendly because of CA smog.Called summit,asked about CCA-12-205-2 800-4800RPM 206/206-.425"/.425" but no go not TBI friendly.I know EDL-3702 is but how about EDL-2102,Crane crn-113902/crn-113932 or crn-113934 listed on tbichips.com.Also will any of these can go lopey.That is definitely a must.

[narizon]

1BAD94, how is Crane can crn-114142 doing for you?I see its for
1800-5600 RPM.Are you running a stock torque converter?

[1BAD94]

yea im runing a stock converter thats why my cam doesnt help as much as it has to. i need a build trany with torque converter and some gears with posi.but anywys you will feel the difference at top end

[narizon]

I have B&M tanspack street/strip,corvette 2/3 and Sonnax 4th servo on my 700r4 and also running stock converter.I'm going to settle for the
Edelbrock EDL-2102 204/214 @050" w/ .420/.442 lift.This cam is idle to 5,500 RPM so I'm hoping it will work fine w/ stock conv.Not 2 manny choices avaliable for TBI

[93ChevyTBI]

The Lunati Voodoo series is pretty good for a flat tappet as well as the Comp XE series. BTW: you want more LSA...like around 112 or more..mine is 111 but my tuner was great.

If money is no object, you may want to look into a roller cam conversion...more lift, more torque.

[narizon]

this EDL-2102 isn't comp friendly but I'm hoping TBI chips stage 2
will help out.I was originally thinking on comp 12-205-2 800-4800
206/206@.050 w/ .425/.425.I ran this on my 86'blazer and was really impressed.

[93ChevyTBI]

for the money involved, why are choosing such a small improvement? why not get see more hp/torque for the same price?

but to each his own I guess

[narizon]

I'm currently living in nor-cal and smog is only done at title change but will soon move down south to San Diego where manditory test is every 2 years.Your right on the cam,what would you recommend?Still on budget but could squeeze out some more dough if need to.Tryng to get everything cam kit,chain,cover,gaskets,sprins and misc parts for $400.

[Red94Chev]

There are diminishing returns on camshafts >212 degrees intake duration at 0.050 because of poor airflow of the stock heads at high RPM. That's why most guys upgrade to a 206/2xx camshaft. 212/218 would be the most I'd install with the stock heads and stock torque converter. Rear gears, in this case, should be 3.42 or higher. 90% of driving is usually 4000 RPM or lower. Maximize for the most torque possible and you'll be happy.

Remember that you'll need a tune for any camshaft change as well.

[1BAD94]

mine still untune there are no tuneres where i live

[narizon]

Thanks,that's good info and what I wanted to here.I will put this to good work.I'm going to use TBIchips.com for a stage 2 chip tune.

[1BAD94]

how well does the stage 2 chip work and how much will it cost

[narizon]

this chip is from TBIchips .It works between 87'-91' 350 tbi.
says it good for 25 hp & better power ^ 3000rpm.You also need headers & high flow exhaust.$150.00 at your door.

[Justv610]

Hey narizon, if you are unsure about your cam still or other performance upgrades, email Brian, he is the one who burns the chips @tbichips.com. He is very helpful and will return emails.