TeamSwift

Most of the grind specs are buried in the custom camshafts thread so I'm posting them here. It will make it easier to see what is available for your motor.
Lift is listed as gross (at the valve) in inches, and duration is measured at .050" lift, at the valve.

The 89-up 3cyl and GT have the same valvetrain design, so these are listed together.
Lift/Dur
305/184
335/200
340/210
350/218
365/222*
375/226*

85-88 3cyl/85-94 1.3/1.6 8V
358/212
375/216
395/226
420/254
448/240

1.3/1.6 16V SOHC
340/200
355/204
365/210


This is an excellent grind for the G13 SOHC 16V, and works well with the OBD II

.340" lift, 192int/198exh duration
Thats a 8 degree gain on the intake and a 14 degree gain on the exh.
The exh. duration, and extra .060"(!!) lift gain will help offset a less than ideal exhaust.

I have developed a new cam for the G13/G16 16V SOHC.

206 degrees duration at .050" on the intake, with .370" lift
210 degrees duration at ,050" on the exhaust with .370" lift.

This is a very aggressive cam for the G13, and slightly less so for the G16.
Probably will not work without setting a code on the OBD II cars, but would pull strongly past the fuel cut anyway.
Should work OK with the OBD I, and G16 without problems.
This is a very high lift cam for the application, with generous duration on the intake side.
The exhaust is a good compliment.


I can do cams for other applications, but these are the most popular ones. I have cores for both 3cyl. motors, GTi's, and pre 95 4cyl. 8V, but not for SOHC 16V motors.
Cost without cores USD
89-up 3cyl. $150 (cams with * require extra machining at a cost of $25)
Early 3cyl/4cyl 8V $150
GT 16V $300
SOHC 16V $200

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Contact 3tech: [email protected]

I wish I knew what the stock profiles were for my engines so I could judge the difference. Are your grinds progressive for the 16V?

Thanks,

-Steve

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There is no replacement for displacement... is an irrelevant statement at 7500RPM and 21 PSI.

For comparison, stock profiles are

Lift/Duration at .050"

85-87 1.0/3cyl 330L /192D
89-01 1.0/3cyl 330 /198
GT Int 295L/192D Ex295L /198D
Cultus In 305/L192 Ex305/D198
1.3 8V 330L/192D
1.3 16V SOHC 308L/184D
1.6 8V 356L/202D
1.6 16V In 308L/192D Ex308L/198D

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I = Intake E = Exhaust

E for Exhaust cam
I for Inlet cam

Cheers

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Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.HP is how fast you hit the wall, torque is how much you push the wall out.

hey mike can you give us a driveability / idle quality comparison between the stock cams and the ones u have listed? for example, you can state that a specific cam profile is wild or mild or like saying it idles without lumps at 1000rpm or 2000rpm for a wilder cam.

thanks
Ian

I would prefer to take specific questions from people. There are alot of grinds there, and results will vary depending on application. The questios will still come up, anyway, so I prefer t answer them on a specific basis.

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hey suprf1y

how much degrees of advance or retard can i run on my adj cam gears with your camshafts (340/210) before i hit the piston?

oh and do you know the lobe separation angle of the cams?

I don't know how much you can adjust them before hitting a piston. Every motor is potentially different, so I wouldn't want to guess. I can say that if you have to advance/retard them that much, then you have a tuning problem.
If I recall, stock separation is 106, or 108 degrees.

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thanks anyways

i was jus reading a couple of d-sport and sport compact mags where they had extensive tech articles on cams. so i haven't even started doing any tuning yet, i jus wanted to kno my limits thats all.........

What kind of differences can I expect from going from the stock cam to the 210 duration cam for the 16V SOHC 1.6L ?

As it sits, I have no dead spots in the powerband, with excellent torque from 2200-4200 RPM. (tq peak).... and not bad.... top end but definetly falling off by 5700+ RPM. (In/Exh and pulley)

I recall that your 3 cylinder cam improved all area of the powerband when installed properly,

On an aside.... why have 16V if you never take advantage of the RPM capability of 16V in a 1.6L?

-Steve

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There is no replacement for displacement... is an irrelevant statement at 7500RPM and 21 PSI.

The 4V/cyl motors are much more duration sensitive than the 2V/cyl. motors.
For this reason, you gain RPM, and lose bottom end with much less duration than what is required for a 2V/cyl. motor. You can expect a shift in RPM range of about 1000RPM for every 10 degree increase in duration for the 4V/cyl motors. It is about half that for a 2V/cyl.
Of course, every application is potentially a little different, and the 1.6 with a much longer stroke should be a little less sensitive to low end power los.

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i just installed a cam on my 3cyl and i did notice a bit more power but what i did notice is that the power is there almost at idle right to redline. now i have a smooth pull rather than specific power ranges

(500-2500) 2600-3800(dead) (3900-redline) power

now its steady power all the way up.

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rip my poor baby sept 1994-apr 2008
91 sidekick, 4x4 2" lift 30" swampers, winch,
to come ..... performance bits.... body lift, custom bumpers

How much is core charge? And would cost be the same getting the 380/240 cut from a n/a cam as from a turbo cam? I'm trying to keep all of my stock parts so I could switch it all back to stock if need be and i've got a n/a cam layin around.

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Its not lag, its suspense...
1987 mk1 T3

I don't have an much in the way of Mk1 3cyl. cores, so I am looking at that charge right now. The idea behind the core, is to encourage return of the old one.
I'm bumping that one up to $50, same as the GT cams.

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Contact 3tech: [email protected]

How much cam will the stock ECU take? I have heard that you can go up to about 270 degrees in duration. Bob

Which car do you have, which engine do you have and where the hell are you? fill out that info and people will be much more pleasant and willing to answer your questions.

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Its not lag, its suspense...
1987 mk1 T3

1994 Geo Metro 1.0L 5 speed 2 door Missouri USA

And excuse me for my ignorance. I thought I was following the 3 cylinder thread. Bob

That sounds like an advertised number, and I don't use advetised duration numbers. The 3cyl. will work fine with all the profiles I have for it, with the exception of the 226/375, which causes problems loading up on idle, but works fine at all other RPM levels.

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hey mike, was wondering if anything needs to be done to the head to support a more aggressive grind then 340/210 for the gt motor.

Don't know how I missed this, but no, the stock GT head will take my wildest cam, with no trouble.

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Hi looking a set of cams for my rallly car would the most wildest set of cams be the bests?? its running r1carbs and port n polished with valve seats all angled hyd lifters would i need to convert to solid lifters !!!

Ross

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Flat To The Mat

Sorry forgot to mention its a 1300 16v DOHC G13B

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Flat To The Mat