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Old 01-10-2010, 08:17 PM
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350 SBC Porsche 944

It all started when my 14 year old son saw a Porsche 944 that needed engine work for cheap. I figured it would be a good chance for him to learn something so we brought it home! We pulled the engine and ripped it apart, found a couple of lock washers had made their way into a couple of cylinders??? and in my opinion wrecking the aluminum block. I figured time for a Small Block!

Found one the next day!!! Guy pulled it out of his '69 Camero and installed a 383, 700R4 and 3.70's during the repower. He was a little vague how it ran when he pulled it out indicating a miss and finding a Broken plug during removal however it came with a NEW Edelbrock EPS and NEW GM Performance Parts Chrome tall valve covers for all of $200.00

That night my boy and I pulled it apart, found 882 heads with 1 cracked exhaust seat. FRESH REBUILD!!! .030 Hyper Flat tops, .010/.010 crank, double roller timing chain still tight! So I need heads!

Decided on 67cc RHS ProTorquers with 2.02/1.6 valves. Have new Ferrea 5000 valves on the way also... will run a .015" steel shim head gasket to keep the quench tight (after cleaning up today deck height measures .032") for just a hair under 9.7/1 CR

So I guess the only thing left to decide on is camshaft! The way everything adds up so quick I was thinking of trying a Summit brand camshaft!
First one that caught my eye was a SUM-K1105 with 224in/234ex with 0.465in/0.488ex. Car is a standard and light... I do want a reasonable idle though...Should I step it down a notch? It will be a daily driver during the summer! thanks!!!

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Old 01-10-2010, 08:31 PM
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I've run that very cam in a similar motor in my S10 for over 130,000 miles and liked it. I used a 2800 stall lock-up converter in the 700R4 trans, and a 3.70 geared 9" Ford along with it. If you don't plan on a similar converter, you might wanna look at the 1103, it would probably work out much better for ya,
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Old 01-10-2010, 09:54 PM
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Does it idle OK? Mine is a standard but I don't want a soggy bottom either, like be able to plug along at 1500 in traffic? 120000 miles I guess quality isn't an issue! thanks,
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Old 01-10-2010, 10:29 PM
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With that combo and tune, I could idle it all the way down to 400 rpm, you could count the cylinders firing, , but it liked about 700~750 rpm in drive, and 18 of initial timing. I think I would have liked the 1103 a little better actually, but you will have just a bit more compression, so the 1105 may work better for ya. IMHO, the 1103 would be the safe choice, but the 1105 might work just as well, or perhaps a little better.
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Old 01-10-2010, 10:42 PM
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well how about splitting it down the middle with the 1104?? 224/224 with 0.465/0.465. 1103 looks pretty decent, little tighter lobe seperation.
summit seems to be a little conservative with their RPM sugestions?
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Old 01-11-2010, 07:27 AM
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Unless you've got heads that flow better than average on the exhaust side, IMHO, you're better off with the split lift and duration.
On Summit's rpm ranges, some would say conservative, some would say realistic, I find them to be a pretty good indicator as to driveability.
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Old 01-11-2010, 08:10 AM
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doesn't the 944 have a transaxle?
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Old 01-11-2010, 08:32 AM
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The RHS Propoganda implies they flow very good? However yes, it looks like the split lift and duration has a wider RPM range compared to their single patterns however were also talking 110 degree LSA for the splits and 106 degree LSA for the single pattern which would certainly affect it also. Price diference between Summit and comp. single patterns is only $35.00.

Yes the 844 has a transaxle, 5 speed manual, why? Easy swap!
Supposed to be able to handle 400 foot lbs. of torque however not dragstrip type launches! Clutch is at the engine.. torque tube to transaxle..

I get the impression that there are really NO issues that should deter me from running a Summit cam in favor of a Comp?

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Old 01-11-2010, 08:39 AM
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Quote:
Originally Posted by airboat
it looks like the split lift and duration has a wider RPM range compared to their single patterns however were talking 110 degree LSA for the splits and 106 degree LSA for the single pattern.
you may want to check that again, single patterns usually have more power where you're driving but split patterns have a higher power peak, this is assuming you keep the same intake duration and only change the exhaust.

LSA's are a funny subject... For max drivability its best to have a wider than necessary LSA, but for a nice lopey idle AND best midrange its best to have a slightly tighter LSA, which heads and exhaust you use affects this a LOT.
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Old 01-11-2010, 08:44 AM
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That's why Im pondering it ap72! I was editing while you were typing!! K00172 has 274/274 with 0.450 with 106 degree LSA. Similar to the cam I have in my 489 powered airboat... Similar to the old 350 HP 350 cam?
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Old 01-11-2010, 09:10 AM
How fast is fast enough?
 
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Quote:
Originally Posted by ap72
you may want to check that again, single patterns usually have more power where you're driving but split patterns have a higher power peak, this is assuming you keep the same intake duration and only change the exhaust.

LSA's are a funny subject... For max drivability its best to have a wider than necessary LSA, but for a nice lopey idle AND best midrange its best to have a slightly tighter LSA, which heads and exhaust you use affects this a LOT.
That's a cam I recomend a lot for near stock rebuilds, Elgin and Crane have the same grind. search for 274h06 and you'll find some videos of it on you tube and a lot of people who have used it on near stock rebuilds and really liked it.
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Old 01-11-2010, 10:21 AM
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thanks for the advice! Bill
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Old 08-02-2010, 04:47 PM
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Re: Transfer Cases

pelican parts is a good place to get it, but for the cheapest price I would try rennlist
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