cam 88 tbi or ????

[boostedblue]

Plan to change cam in my 86 GLH-T this summer looking to just get a roller (for less wear maybe smother idle) any suggetions would be welcome (car has MP comp. K&N ,):bounce: :bump2:

[cordes]

Plan to change cam in my 86 GLH-T this summer looking to just get a roller (for less wear maybe smother idle) any suggetions would be welcome (car has MP comp. K&N ,):bounce: :bump2:

I greatly prefer the 88 TBI cam in my omni as opposed to the FM505 that I had in there before.

[boostedblue]

I greatly prefer the 88 TBI cam in my omni as opposed to the FM505 that I had in there before. how do it run and idle todd

[cordes]

If you are refering to the 88' TBI cam, it idles great and runs like a champ.

The FM505 was a rough idle to say the least, but it did run well. People thought that a muscle car was rolling up, so the omni confused people for sure.

[Aries_Turbo]

hey Guys, Im moving this thread to the induction section... its about cyl head stuff. :)

Brian

[Holley]

I've been using an '88 TBI cam in the T1 in the Charger for a while, certainly for daily driving its nicer ... especially if you have a headache, lol.

I didn't notice any change in performance, but its only been running at stock boost levels, and the engine has been disintegrating anyway.

[mopar-tech]

I noticed a touch of less low end compared to an 89 Turbo I/II camshaft.

[moparzrule]

I ran the 88 turbo roller cam in a G headed 2.2, dyno said 260 WHP and 317 WTRQ....quite torquy for that setup. I loved that cam.

[turbovanman²]

88 tbi or 89 T1 roller.

[BadAssPerformance]

Which 88 TBI cams do most people run? 2.2L or 2.5L ?

[turbovanman²]

Which 88 TBI cams do most people run? 2.2L or 2.5L ?


Your supposed to run the 2.2 version.

[briceturbosports]

i run one works well turbo spools nice & quick runs smooth

[3Bar_Mopar]

I've got a '88 2.2 turbo 1 roller in my '90 2.5....is this ANY improvement over the stock '90 cam? The profiles looked a hair more agressive.

[moparzrule]

Yup, 88 roller has a hair more duration. Advertised durations from mopar-
89-up roller- 228/228
88 roller- 236/232
87 slider-240/240

I prefer the 88 because it's best for all around power, doesn't sacrifice too much up top like the 89-up does. Then again, if you want top end the taft S2 is an excellent choice for a DD. I used one, pretty nice.

[BadAssPerformance]

Your supposed to run the 2.2 version.

whys that?

[8valves]

If you are refering to the 88' TBI cam, it idles great and runs like a champ.

The FM505 was a rough idle to say the least, but it did run well. People thought that a muscle car was rolling up, so the omni confused people for sure.

You head my car idle, how is it (TAFT S3) in comparison to the 505? I love the rougher idle, wouldn't change that out for a smooth one any day of the week, not to mention the high rpm pull.

Aaron Miller

[cordes]

You head my car idle, how is it (TAFT S3) in comparison to the 505? I love the rougher idle, wouldn't change that out for a smooth one any day of the week, not to mention the high rpm pull.

Aaron Miller

Your car actually sounds much more tame than my omni did with the 505. I am sure that my ghetto exhaust had something to do with it being so unruly. I wouldn't change anything if I were you either.

[turbovanman²]

whys that?


I think the 2.5 has a milder grind, need to dig up 2.5 specs, :bounce:

The S1 looks to be a nice cam but personally, I think on a stock head, intake and manifolds, the S2 and S3 are useless.

[BadAssPerformance]

I think the 2.5 has a milder grind, need to dig up 2.5 specs, :bounce:

The S1 looks to be a nice cam but personally, I think on a stock head, intake and manifolds, the S2 and S3 are useless.

They have about the same lift, but the 2.2L has more duration and overlap. Turbo cars usually dont like overlap, would be very interesting to do a back-to-back...

[glhs875]

You head my car idle, how is it (TAFT S3) in comparison to the 505? I love the rougher idle, wouldn't change that out for a smooth one any day of the week, not to mention the high rpm pull.

Aaron Miller

I agree, The Taft S3 rocks! Even as a street cam. My 2.2 pulls 15" of vacum, with a slight rumble, and has very good throttle response. And it pulls harder to and past 6000rpm than any cam I have tried so far. The S3 picked up 2mph with 5psi less boost over the Taft S1, which ran real close to the same as an 88 T2 roller. Except the S1 was more torquey,with a little better throttle response over the 88 roller.

[8valves]

I agree, The Taft S3 rocks! Even as a street cam. My 2.2 pulls 15" of vacum, with a slight rumble, and has very good throttle response. And it pulls harder to and past 6000rpm than any cam I have tried so far. The S3 picked up 2mph with 5psi less boost over the Taft S1, which ran real close to the same as an 88 T2 roller. Except the S1 was more torquey,with a little better throttle response over the 88 roller.

Interesting, the best I could get was abut 12-13" of vacuum. Also, throttle response isn't exactly the best, to me at least. Did you degree yours? I have yet to do so, even for the dyno I just set it at 5* advanced and ran it.

Aaron Miller

[moparzrule]

I never got to run my S3....I ran an S2 and it idled at 18 inches. The TU cal helped soooo much with idle quality. The stock 88 roller idled at 22 inches.
I think S2 was nice for a DD, spool-up was a tad slower than stock cam but not horribly bad...about 300 RPM slower spool. Throttle response was fine, idle had just a hair of a chop. Top end had the biggest impact, pulled harder on the highway.

[tvanlant]

22" of vacuum? wow. Why is it my 87 GLHS only pulls 16"? It had 16 with the stock cam, and 16 with the 88 TBI. Its a fresh bottom end and there are no vacuum leaks that I am aware of.

[moparzrule]

With the stock ECU I could manage 18'', all credit is due to the TU cal! I guess it has something to do with the spark curves and injector duty cycles to get it to idle nicer. Are you using a GLHS cal? Those are typically pretty crude. Get a TU cal!!!

[MMRacing]

Is anyone running the TBI cam with different degree settings? I am working on a friends 86 GLHS with the equivalant to a Enforcer 2 turbo and at the same time I switched it over to the 88 TBI roller, but the mid range seems to be lacking far more then it should be even with the .63 housing.

My next step is to try a turbo roller and see where that goes.

[glhs875]

Interesting, the best I could get was abut 12-13" of vacuum. Also, throttle response isn't exactly the best, to me at least. Did you degree yours? I have yet to do so, even for the dyno I just set it at 5* advanced and ran it.

Aaron Miller

Yes, I tried different settings from 4 degrees advanced to 4 degrees retarded(where I like it best right now). Iam using the square tooth sprockets. My vacum would drop some after I retarded the cam to about 11" to 12" but then after the computer would fine tune the idle air fuel ratio, the vacum would go back to 14" to 15". I have my idle set at around 1000rpm to 1100rpm. Iam also using a stock 86 cal with +20's and 42psi static fuel pressure w/ 4 to 1 RRReg. I also have aux injectors which I will be converting over to alcohol very soon. My car is also an auto with a 4000rpm converter, Iam sure that helps the throttle response. I can launch from second gear (MVB W/2.78 final drive) with only a couple of psi of boost built up and just instantly blow the tires to around 75mph. Right now first gear is kind of useless with street tires. Last time at the track I had to launch by bringing the revs up to about 2500rpm with no boost built up and just let off of the brakes, holding the part throttle past the 60' mark and was still spinning badly in first gear. After I would feel the tires grab I would nail the throttle. Still managed an 8.84 @ 84mph- 60' 2.23 with a bone stock head, block,& turbo but with a .63 housing @ 18psi.

[8valves]

Yes, I tried different settings from 4 degrees advanced to 4 degrees retarded(where I like it best right now). Iam using the square tooth sprockets. My vacum would drop some after I retarded the cam to about 11" to 12" but then after the computer would fine tune the idle air fuel ratio, the vacum would go back to 14" to 15". I have my idle set at around 1000rpm to 1100rpm. Iam also using a stock 86 cal with +20's and 42psi static fuel pressure w/ 4 to 1 RRReg. I also have aux injectors which I will be converting over to alcohol very soon. My car is also an auto with a 4000rpm converter, Iam sure that helps the throttle response. I can launch from second gear (MVB W/2.78 final drive) with only a couple of psi of boost built up and just instantly blow the tires to around 75mph. Right now first gear is kind of useless with street tires. Last time at the track I had to launch by bringing the revs up to about 2500rpm with no boost built up and just let off of the brakes, holding the part throttle past the 60' mark and was still spinning badly in first gear. After I would feel the tires grab I would nail the throttle. Still managed an 8.84 @ 84mph- 60' 2.23 with a bone stock head, block,& turbo but with a .63 housing @ 18psi.

Interesting. All TAFT cams are designed with a round tooth in mind. I was told that using a square tooth to start off with already retards you 4*!! I could be wrong about that, but then that would make ou at 8* retarded! Yeow. Most of the other guys that run them (all three of them, haha!) and have played with the timing like it very advanced, like 7* adv. Interesting stuff. I guess actually degreeing it is probably the best way to go.

Aaron Miller

[glhs875]

Interesting. All TAFT cams are designed with a round tooth in mind. I was told that using a square tooth to start off with already retards you 4*!! I could be wrong about that, but then that would make ou at 8* retarded! Yeow. Most of the other guys that run them (all three of them, haha!) and have played with the timing like it very advanced, like 7* adv. Interesting stuff. I guess actually degreeing it is probably the best way to go.

Aaron Miller

I will admit that it ran crisper and pulled a little more vacum at 4 deg advanced. But with the 4000rpm stall, I really don't need much low end torque at all. The cam pulls harder once past 6000rpm with it retarded 4deg, and with still more than enough bottom end torque with my combo. I figure once I put my highly ported big valve head, along with a much larger turbo & stronger valve springs on, the engine should be revving past 7000rpm. But I'll have to have a cal with the rpm limit raised also.

[moparzrule]

The thing about the square VS round tooth gears is true. Putting a cam designed for a round tooth on a sqaure tooth and it will be 4 degrees retarded.
When I ran the taft S2, I ran it on a square tooth gear and 2 degrees advance which means I ran it at 2 degrees retarded.

[glhs875]

The thing about the square VS round tooth gears is true. Putting a cam designed for a round tooth on a sqaure tooth and it will be 4 degrees retarded.
When I ran the taft S2, I ran it on a square tooth gear and 2 degrees advance which means I ran it at 2 degrees retarded.

Has the centerline been changed or what is the centerline, since the Taft cams are regrinds. When I degree my cams in, I just shoot for the best all around performance by trial & error.

[turbovanman²]

Has the centerline been changed or what is the centerline, since the Taft cams are regrinds. When I degree my cams in, I just shoot for the best all around performance by trial & error.


Tafts are ground straight up.

[moparzrule]

As simon said, tafts are straight up. Tuning by trial and error on a dyno is never a bad idea when it comes to degreeing in a cam.

[glhs875]

Tafts are ground straight up.

So what degree 110-112-115? is considered straight up?

[ShelGame]

The factory roller cams intake CL is 122*. Not sure if the Taft is the same...

[turbovanman²]

So what degree 110-112-115? is considered straight up?

Hmm, I can find out when I get back, a friend has a cam doctor but there designed so you put the marks at TDC, lol!