North American Turbocoupe Organization



"B" cam and wiring w/g open...
jabobia Offline
Member
#1
in a previous post, pete d asked me to find out what cam i have since i am only pulling 15"Hg at idle

the previous owner told me he thinks there is a "B" cam in it and its from a n/a 2.3...would that explain the 15"?

also - if i was to wire the wastegate open - would the car be drivable?...i want to try and do some streetdyno runs with the car running 'n/a' and then on boost for comparison

yes i have some rediculous ideas sometimes and i welcome critcism [Image: biggrin.gif]

-james

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87 TurboCoupe - 5spd
87 Thunderbird TurboCoupe - 2.3T, T5, 3.55L - K&N, 18psi - [email protected](2.37 60')
88 Thunderbird Sport - 5.0SO, AOD, 2.73L - [email protected](2.39 60')
www.cardomain.com/id/jabobia
jabobia.com
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Anthony M Offline
Member
#2
Instead of wiring the wastegate rod open somehow, just take the c-clip off the rod where it hooks to the turbine housing. This should eliminate boost...

Anthony

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88 TC, new paint job as of Dec 2002
T3
Gillis set to 16
88 TC, T3, Volvo IC
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Pete D Offline
Administrator
#3
There is cam shaft info here and the is a "B" in the group. http://www.merkurencyclopedia.com/

Click on :camshafts" on the left and scroll down to the charts.
Pete Dunham


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jabobia Offline
Member
#4
cool and cool

im not really sure how to read cam specs but i see the lobe seperation is only 1* less than stock...lift is higher and duration a little higher...because there is more duration and less lobe seperation does that mean more overlap and less idle vaccum?

does this seem like a good cam to you?

-james

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87 TurboCoupe - 5spd
87 Thunderbird TurboCoupe - 2.3T, T5, 3.55L - K&N, 18psi - [email protected](2.37 60')
88 Thunderbird Sport - 5.0SO, AOD, 2.73L - [email protected](2.39 60')
www.cardomain.com/id/jabobia
jabobia.com
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Pete D Offline
Administrator
#5
I'm not going to pretend ot understand cam design.I know there is a science to it but I'm still at the voodoo magic stage. I kind of looked at the specs of the B cam, what little there is on the stockers and then also at the A237 which I have and can only get 15" vacuum from. If I had to guess and that's all this is, I would say you should get more than 15" from the B. It has a lot less duration than the A237.

Isit a good cam: I don't know and what I like you might hate. I have no experience with the B. Is the A237 a good cam? It idles rough, is dead until 3K rpms and vibrates the whole car below 60 mph in 5th gear. But hit 3K with the boost on and it screams.

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NATO Member. it's not a vice, it's an obsession
Letting the cat out of the bag is a whole lot easier than putting it back in.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Glenn 88TC Offline
Posting Freak
#6
Quote:Originally posted by Pete D:
But hit 3K with the boost on and it screams.


I thought that was you screaming while goping down the track. Sorry!! [Image: tongue.gif]



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mods: SDS Digital Fuel Injection, ported & polished big valve head(1.89/1.59), .500 lift roller cam, custom upper and ported lower intakes, TE60 turbo, powerstroke intercooler, 60mm throttle body, 75pph injectors, Walboro 255HP pump, Kirban adj. fuel reg., ATR header, 3" exhaust with Dynomax Ultraflow muffler, MSD 6al, MSD coil, MSD Launch Control, MSD 8.5mm wires, K&N filter, Star stage III clutch, Greddy Profec B boost controller, Weld Draglites with M/T ET Street 26x11.5/15
NO TC and NO headaches.
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Pete D Offline
Administrator
#7
Oh! you heard that over the whine of the turbo, the throbbing of twin straight through mufflers, the shreading of tires and the knashing of gears, all while my head was incased in a helmet I couldn't even breath in. It must have been due to the mutiple G forces pressing me back in the seat and forcing the air out of my lungs. [Image: biggrin.gif] That's my story and I'm sticking to it!!
Pete Dunham


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jabobia Offline
Member
#8
LOL [Image: biggrin.gif]

pete - does your car also pull 19" if you hold it steady at say 2000rpm in neutral?

anthony - i cant seem to find the clip on the w/g arm...i cant actually see in there but i got my hand in there and i cant feel it - is it on the top or bottom? i still have the ihi

-james

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87 TurboCoupe - 5spd
87 Thunderbird TurboCoupe - 2.3T, T5, 3.55L - K&N, 18psi - [email protected](2.37 60')
88 Thunderbird Sport - 5.0SO, AOD, 2.73L - [email protected](2.39 60')
www.cardomain.com/id/jabobia
jabobia.com
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turboken Offline
Member
#9
i have an A237 also, and I also get between 12 and 15 inches of vacuum. I'm glad to see I'm not the only one. I was almost kinda worried, and a N/A motor in good running condition is supposed to be around 22 inches....

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88TC- all options minus leather: 129K miles, new motor, bored and balanced block, roller cam(FordMotorSports), Crane ignition and coil. Powerhead with big valves, ported intakes and exhaust, 5 spd with FMS rebuild kit, B&N ripper shifter, K&N cone,
9.564 in the 1/8 mile

93 SC with all options minus the JBL system. Stock with drop in K&N filter and no cats.
9.716 @ 72.507 1/8 mile
88TC-Black/Raven,A237 cam,ported and polished intakes/exhaust, gillis valve, o-ringed deck, head studs
85 Xr7 rough survivor 82k miles
2008 Subaru Impreza non turbo :-(
73 Honda CB750 (running parts bike for dads '69)
04 Honda 1000rr
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Pete D Offline
Administrator
#10
Actually the vacuum range for a motor in good condition (and no radical cams) is 18 - 22 but 4 cylinders tend toward the low end and 6s and 8s toward the high end.

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NATO Member. it's not a vice, it's an obsession
Letting the cat out of the bag is a whole lot easier than putting it back in.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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