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-   -   Old school 2.8's what do you guys think? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/820829-old-school-2-8s-what-do-you-guys-think.html)

TCracingCA 08-07-2014 11:40 AM

Good to hear from a fan of this size engine, and with success!
 
Quote:

Originally Posted by Lapkritis (Post 8201795)
I have a 92mm bore 2.8 with carbs, hot cams, headers, JE pistons etc... It's plenty fast for the street. Great revving engine and a blast to drive.

Back in the early 70's when my Father was borrowing Corky's 1960's something Targa S in the funky green which caused our families interest to change from the 356car we owned to keeping that and adding a Porsche 911, by the time that happened we were into the latter part of the 70's and the Carrera's were not a consideration due to the new car prices, and only a dream and the new Turbo's were black magic mystery cars that got mixed reactions about new fangled technology! If someone bought one, they were wearing their polyster slick suit and talking on the CB radios, with the 8 track going, plus no one knew how to drive Turbo's back then!!!! The tales of Turbo lag and the dangers almost killed it and I think leading into the 80's like what 5 Turbo's total were actually sold in Los Angeles only in general or something!

Thus no one, except the in crowd knew or designed builds on the reinstituted aluminum cases, because not enough of them had worn out, or had blown up to have been plentiful for ultra hp builds. Plus all of the hot racing cars had the Mag cases, so everyone that wanted a hot rod build went after the mag cases and the appropriate parts to trick those out. And honestly I don't know how Mag cases got the bad rap!!!!!!!!! I think guys started to push the boundaries on them, and were doing exotically larger bore builds and the horsepower levels were developing into the ranges of concern for the ultimate capability of that case! But with an intelligent build, I see no flaw in having the Mag cases and those can be successfully built, but we generally as a Family have put the hot rod cams and such on them, with mostly the latter generation 7R cases and such. Would I like aluminum, I see the one guy dreaming of 49K for I think a 1964 engine case for sale on EBay currently and for similar earlier cases, I don't know what the capability of boring those out for fitting larger pistons they have without further study, plus they don't have some of the improvement features that went into the development of the mag cases, and none of the stuff in our garages (pistons and barrels) fit a normal aluminum case of the 3.0 liter or latter! Therefore with the advent of the 3.0 aluminum, the HP basically on the non-Turbo cars stayed relatively stagnant during the early Turbo craze and economic factors and smog laws and bumper laws and such were hurting the performance offerings on the lessor 911 priced models, plus Porsche was trying to go all front engine with the 924/future 944, and the front engine 928 was on the drawing board. With space aged Lamborghinis, and Lotus Espirits, and Smokey the Bandit Trans Ams being the rage, I thought the 911 was doomed back then for awhile! Therefore I was wondering by starting this thread if there were others that got out of touch with civilizations advancements into aluminum cases and the eventual larger bore stroke engines and Turbocharging, and then walked out of the woods realizing Porsches in the modern now have water cooling etc.. and as to whether there are any other Porsche former Porsche hillbillies who ended up with parts in the garage or with cars with the old school stuff; throwbacks to the caveman days of Mag cased cars (Cro""MAG""NUM men)! Or should the Smithsonian Museum put our 2.8 racing builds on permanent display next to the dinosaurs?

I work in Property Management and I in Los Angeles get complaints from tenants about Raccoons and Possums needing to be dealt with (put in Zoos or something) because of the modern thinking of people living in a civilized society! Thus are the majority of Porsche enthusiast thinking that 2.8 liter RSR builds are a Vintage Trend only, or should such Owner's and their engines be put on display in a ZOO?

Jimmy18E 08-07-2014 03:46 PM

2.7 Short Stroke on a 7R case.... 268 HP to the wheels in street trim & 8200 redline. Great alternate to a 2.8

http://forums.pelicanparts.com/uploa...1407455080.jpg

TCracingCA 08-07-2014 06:25 PM

???
 
Quote:

Originally Posted by Jimmy18E (Post 8203152)
2.7 Short Stroke on a 7R case.... 268 HP to the wheels in street trim & 8200 redline. Great alternate to a 2.8

http://forums.pelicanparts.com/uploa...1407455080.jpg

66 X 92 2631.95?
66 x 92.8 2678.66?
66 x 93 2688.94?

PS- good looking bay!!!!!!! Very clean, tidy, organized, purpose built looking!!!!!!!!

TCracingCA 08-07-2014 09:45 PM

Here is some more time traveling back to the 1970's!
 
Found some of the notes on 1970's head porting techniques, probably when I visited one of those old school shops to get some old school work done!

Actually some of the old IMSA/SCCA Trans Am racers actually did ""not"" prefer the S or RS heads or even the RSR heads!!!!!! Some of those guys loved doing the ports on the very small port heads because of the meat available to cut and where the contour or flow could be developed in relationship to where the floor would be, thus eliminating the need for a whole bunch of welding!

Thus I guess guys selling these on Ebay currently will get an increase bump in interest once this is read!:eek: Thus forget the pre-hogged out ones, go play with the low HP ones for some real fun!

jmz 06-12-2016 11:48 AM

I am joining into this thread. ...just purchased an old 914/6 racer. It was Dave and Ellen Fergusons car that some here may remember.

It has a 2.8 that I'm trying to do some detective work on and figure out what I truly have here.

I think but not sure that it was originally a Peter Dawe build... It's built on an early aluminum case supposed to have long rods and I can tell for sure its wider than a stock motor.

The cross bar for the weber linkage is welded up to add about an inch and I don't think I have enough clearance to drop the lower valve covers... It is an interesting build that most recently was under the supervision of Rudy Bartling... May be to racy for my intentions but right now I'm just trying to determine what it's all about and get it tuned and running smoothly.

Walt Fricke 06-18-2016 04:07 PM

Yes, Dave had to do some extra work to deal with those longer rods! You should be able to find him easily enough - look for Veracity Data (an ad every month in Sports Car). He's in California outside of Paso Robles.

There was a physician from Colorado Springs who ran such a motor, but I don't recall if Dave bought it or built his own.

I've got the top end of the 2.5 short stroke Grady Clay built for Bob Benight for that car. I bought the motor from Dave when he went to the 2.8. I cannibalized the case, sold the S cams, used the crank and rods in another motor. Not much of a market for EMPI 88 Ps and Cs, small port heads and 6 bolt intake cam carriers and covers.


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