Anybody tried this? results? thoughts?

Figured this might be a good way to make more power without increasing boost. Stiegemier performance is close to me and is known for their supercharger porting and says he can do the maggies as well. Just wondering if anyone tried this and what gains you may have gotten. He tuned my 468 in my 69 and I was real happy with it so considering giving him a shot with my FRC this summer.


Pat Kunz

 

Although it's not a Maggie. Steig's ported the Eaton on my truck and I picked up ~30 hp. Let me know if Stieg's is going to do the tune, I'll stop by and say hi.

 

the eaton in the truck application has a lot more turns in the airflow and gets better results from porting than the C5 version. I have talked to several porting shops and all came back with we will do it but we cannot say that it will give much of a power gain.

 

Would be great to know if someone actually tried this and what they got out of it. Maybe someone needs to be a guinea pig


Pat Kunz

 

Will do I spend a lot of time out in the St. charles Mo. area, do you hit any shows out that way?


Pat Kunz

 

I did the "Vette's" Restaurant show last year, and stopped by one at the Mid Rivers Bandanas. I'm not big on doing the shows, but like to stop by and check out the cars.

 

I pulled the maggie and took it up there to Stiegemeier today. The main reason is to remedy the clacking noise I get from it once it's warmed up. But if repairs are fairly cheap I may have him see what he can do with it as far as porting, etc.


Pat Kunz

 

Talk with Jeff @ TPE he might have an idea - I know he deals mostly in KB's but O know he might have a good idea!

Thanks,Matt

 

Well I'll find out tomorrow on the damages and performance options. Talked to Bob today and said it had a bad bearing and he has it on order.


Pat Kunz

 

I will be listening, and additional air flow would help me

 

Well it's done. Going to pick it up this Saturday and hopefully have it going Saturday night. I ended up selling my work beater car for a great price, so I gave them the green light to do whatever they thought they could do to improve it. So it's been cleaned, rebuilt, blueprinted, and ported. I'll find out Saturday on the specifics, of what all was done and what improvements they made on it. I'll post again after I pick it up and talk to Bob, so others of you with maggies can decide if it's worth the work and money or not.


Pat Kunz

 

Bob can be a little out there, but does good work. Hope you see some nice gains!!

 

Any updates?

 

Well here's the update, The good, the bad, and the ugly.

Got everything bolted back up Saturday afternoon. Gee is that whole assembly heavy, definitly a two man job to drop the intake and head unit back in there. I got to take a look at a little of the portwork they did, before I installed it back in the car. They opened up the throat quite a bit, looks real nice, should be a definite flow improvement through there. Obviously I can't see under the head unit at all with the intercooler in the way, probably should of had them take before and after pics in hind sight of that area. Well got her all bolted up in about an hour or so. Cycled the key a few times, and checked for any fuel leaks, none found. So I started it up, fired right up and immediately died. Started it again, fired right up stumbled a bit and died. Fired it up for the third time, this time it stayed running but with quite the idle surge 400-1000 back and forth. It eventually settles around it's normal 900rpm. I slap the gas a little bit, it revs up to about 1500 and then dies. At this point I'm running around looking for hoses off, etc. nothing found or heard. Well I think maybe it's just got to re-learn its idle. So I start it up and let it run for a few minutes and afte the inital surging settles and seems to be fine, albeit it seems to be runing a bit fatter then it was before. I gave it a small vacuum leak and it idles up a bit confirming it's richness. It was always a bit rich given the size of it's cam but this was more so then normal. It's staying running for the most part now so I decided to see if it will drive. I back it off the rack and head down the driveway, so far it's doing ok. I pull onto my street and upshift to 2nd, doing fine so far. I get to the end of the street and push in the clutch, dies. I immediately restart it and decide to take it on the road. To make a long story short, stopping was now my enemy. It eventually got better but you had to have your right foot at the ready to blip the throttle if it attempted to die. I did give it one hard stab in third running it up to about 5k, and it seemed to be about normal, first and second are still worthless and tend to set traction control codes if I forget to turn it off. So as my conclusion, I believe that the portwork evidently changed the airflow in the engine enough at idle and low speed to cause the poor idle and low speed qualities. So it's off to the dyno shop on Saturday to hopefully straighten everything out. Well at least this way I can hopefully see what gains I may have gotten, but then again we will be comparing two different dynos, so might be hard to judge. Will update after the dyno work is done Here's hoping that I don't get the phone call about needing bigger injectors, becouse this project is getting expensive

Picture of reinstalled maggie



Pat Kunz

 

Well dropped it off at the dyno shop today, will hopefully see results later in the week Well I guess it's official, I'm now the guinea pig lol.


Pat Kunz

 

Congrats! I can't wait to see the results Very cool to be a guinea pig isn't it ?

 

looks awesome i cant wait to see the dyno!!!!

 

Also, where can one pick up those valve covers?

 

 

Thanks, those are a one of a kind, that were done for the previous owner of the car.


Pat Kunz