North American Turbocoupe Organization



Cam timing
Turbofry Offline
Member
#1
I just installed a new cam in my car. Its a motorsports a233 cam. Mild. it has 270/270 duration with a .415 lift. I am still in the break in period and have the timing set to stock Ford (around 10deg). This cam is supposed to wake up first and second gear. What would be a good timing position to acheive that. I know you kinda have to play around with it. I was hoping maybe you guys have found a good starting point besides the stock 10-12 degrees. Any info would be helpful. Thanks guys.
88TC - KN filter, Motorsports A233 cam, adjustable cam gear, 3" exhaust W/ 3" downpipe. Gillis boost valve, Hurst short shifter, 3:73 rear, T3, 155lph fuel pump, 60mm Mustang throttle body. Sub-frame connectors. Port matched and polished head. Gutted upper and lower intakes. Saab 900s FMIC.
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SteveX82 Offline
Posting Freak
#2
The stock 10 degrees you're referring to is ignition timing (when the first spark plug is fired in relation to the crankshaft position). The stock cam was installed straight up at 0 degrees. You measure cam timing by setting the crank to TDC and seeing how the pointer on the camshaft pulley aligns with the timing markers through that little hole in the timing belt cover. I'm sure somebody else can help you choose how far to retard/advance the cam timing to get the most of it. But keep in mind that to alter cam timing, you'll need an adjustable cam pulley.

[This message has been edited by SteveX82 (edited 03-27-2002).]
Estoril blue 1987 TC 5spd, 148k mi, a237, Bailey BOV, spec stg3 clutch, spearco FMIC, 50 trim t3/t4, 3" exhaust, Bamafuel, LM1, 55pph
Best 1/4 mile: 12.31 @ 110mph on 25psi
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Pete D Offline
Administrator
#3
I have palyed with ignition timing with both the stock cam and the A-230 and for the street, everday type driving, 13-14* is about the max you want to go, otherwise gas mileage and low end driviability suffer. I'm not saying a little more may or may not help at the drag strip, just not fo day to day driving. For me 4* advance on the cam timing works well with the 230. I have tried -2 to +8 and +4 works best for that cam in my car.
You will need an adjustabe cam pully to start playing with cam timing. I prefer the one from Race Engineering for quality and ease of use.You don't have to take it or the belt off to make adjustments. You can't just adjust the stock cam pully by a tooth as each tooth is about 9*. I dont' have any idea what might work with the cam you have, but would suggest you will find it some where in the -4 to +4 area

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NATO Member
88 TC X 2, 86 SVO, Main TC with K&N, 3"DP to 2.5"duals through Dynamax, Ric valve at 17+ and disconnected KS. Elite Bodega 16" chrome wheels. Autometer pod w/ A/F and Vac/boost gauges.140 mph Motorsports Speedo New engine: Total Seal rings and TRW pistons, ported and polished head w/ cc'd chambers,1.59"exhausts, SS valves, gutted upper, knife edged lower, A-230 cam, Race Engineering Adj Cam Sprocket, Crowlers, ARP head studs, and rod bolts. Walbro 255 HP pump and Kirban adj FPR, T-3. Centerforce II, KB subs and jack rails.
Pete Dunham


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