[supraz]

Back in 1993 I purchased a set of camshafts for the 5M-GE.

I sort of forgot about them till now.

Does anyone have any info about them. Are they made by TRD or are they HKS, Gude or ???

The TRD Part Numbers are:
13501-MA272 Description: Intake Camshaft, 5MG 272
13502-MA272 Description: Exhaust camshaft, 5MG 272

I assume that the 272 refers to the duration, but until I can find that TRD catalog fro '93, I really don't know anything else about them.

 

[CST]

ok sorry, I'm not much help here... but how the hell do you forget about cams for 10 years?

 

[supraz]

Wellllllllllll

Back in '93 I blew a head gasket from a water passage to the outside world.

I replaced the head gasket in the car myself. After I put it back together I took the thing out on the highway and when I backed off, boy was there a lot of exhaust smoke.

I say to myself, my old back sure doesn't like working on a head IN the car. Why don't I buy a used engine and work on it in comfort. And while I'm doing it, header, cam, etc., etc, etc.

Once I get this stuff, I check the oil level, find I've over filled it by a quart, drain it, and it's been fine since. :shock:

I just never needed it!

 

[Crocket]

Here is what the catalog says:

Sonny

________________________________________

5MG Street/Track Intake and Exhaust Cam Set

Good bottom-end for street use with strong top end. No other modifications required, but upgraded exhaust will increase the power added by the cam.

Duration: 272 degrees
Lift: 10.5mm

 

[Digilog]

Any chance we could get you take those cams to a regrinder to see how much making clones of them would be for the rest of us? Im sure it could be an interesting group buy.


Carl

 

[TEMPEST]

Nice...

 

[supraz]

I'm going to have to ask other Vancouver members if they know of a cam regrinder in town.

If there is one, sure I'll take them in.

It would be nice knowing that one can build another cammed engine in the future if need be.

I really hesitate to send them across the border, simply because the chance of loosing them.

 

[SupraFiend]

Try Shadbolt Cams at 1713 W 5th Van, 604-738-9505. I've yet to deal with them but whenever I mention cams to someone in the biz in town they tell me to deal with them. Those TRD cams you have are quite rare, I think theres only one, maybe two, other members on the board who have come in contact with them.

 

[82Spearco]

WOW! You have quite a rare item there!!! Vern has a set of those in Atlanta, but I don't really know of anyone else on the list. Not sure if those are the same as his, for some reason, I thought his were 264's....

If you can find someone that will make copies reasonably, I am sure you would find many interested members. As far as I know, the TRD cams are the only ones that make a noticeble difference with the 5/6m.

 

[Old Skool 82]

Are these smog legal?

 

[CRF_Rider]

How do the TRD cams differ from the stock cams? What is the duration of the stock cams?

 

[82Spearco]

Are these smog legal?

Not sure how they could tell what cams you had in the car, even if they pulled the cam covers! How it affects the emission....I don't know. Should pass a visual though.

 

[supraz]

I talked to the fellow at Shadbolt cams and he said that if the cams were originally made by using a reduced base circle there would be no problem reproducing the cams.

If they increased the lift with new billets, then he thinks that welding up six lobes on a shaft could distort the cams quite badly.

Anyways I am going to take the cams in thursday evening to let him have a look at them.

I've also got a stock set of cams. I'll bring those with me for comparison.

I'll let you know what happens.

 

[SupraFiend]

a reduced base circle would be a reground cam, right? Pretty sure trd ones would be straight drop in ones, which would be made from new billets.

 

[supraz]

I think that you are right.

But I won't make assumptions. I'll take them in anyways to see what he thinks.

I would imagine that if he can get the profile, he could reproduce it on a reduced base circle.

It won't hurt to ask.

 

[Deanfun]

you mean it won't hurt to let me test them out?

 

[supraz]

Well................
I'd hate to have the measurements affected by the cams being used. :wink:

 

[supraz]

General question guys,

If a cam regrinder could reproduce a cam profile on a stock cam by using a reduced base circle, I assume that the lift of the cam lobe and the valve will be less than advertised.

I would see 2 solutions to correcting this.

1: Milling the base of the cam box by a similar amount as the reduced base circle radius. This could cause problems because the cam drive belt would have some slop in it.

2: Using valves that are longer than the stock height by the difference in base circle radius times the cam follower ratio (assuming that there is a ratio).

Are the valve dimensions unusual, or could there be replacement valves out there that are the correct length, or could be cut to the correct length?

I may be getting ahead of myself, but a little part manual hunting may come up with a low cost standard valve (maybe in Europe or?).

Has anyone done some valve work with their 5M-GE or 6M-GE engines? I would assume that at the same time, being hot-rodders at heart you would try to increase the valve head diameter at the same time.

Comments? :?:

 

[supraz]

Well, looking at the stock valve head diameter, switching valves to increase airflow is a non-starter. However, I will measure the valve head diameter, stem diameter, valve length, keeper slot width, depth, and height from the head of valve to see if there are any that could work as replacements.

 

[williamb82]

i would just have the cam housings milled. if they can reproduce it for a smaller base circle lmk. and also how much. i wouldnt mind a set.
william