Merc 600's info?
 

does anyone have any tech info on the merc 600's? what block, blower, carbs, boost, etc.? what kind of hp/torque at what rpm ranges are they producing? what kind of experiences have you had with these motors? how many normal hours can be expected out of them before a rebuild?

any info or links to info would be appreciated.

thanks in advance....

chad

I think they were 540ci with B&M 420s.

thanks for the info, brad.

anyone else?????

chad

They are 502's with the megablower, dual holley 750's and cmi exhaust.

did they all have dual 750's on them? the picture i have of the motors sitting in a cig do not have dual 750's on them....

Those are also not B&M 420 megablowers either.

JBK 600'S

the 600's were 502 ci motors with 7.5 compression used the B&M 420 megablower they were rated at 550 at the prop, rpm range was 4800-5200. they would make more power if you ran them with more rpm and boost which i believe in stock trim they ran approx. 5lbs of boost. with a minumum octane of 91 and 93 the perfered choice. they only came as a bobtail and were rough on bravo's.

later- thanks for the info! with only 5lbs of boost, i would think the reliability/longevity would be decent. either way, with 230 original hours, i'm still looking at a rebuild in the very near future.

are you going to be at the lake this weekend? i'll probably be down, but it will be a working weekend for me. i'm finishing moving into the new place and then probably cleaning on the boat, changing oil, etc.

thanks again,
chad

JBK

i take it your looking at a 38 cig with 600's


I would think that at 230hrs you wouldnt get to many moer hrs before rebuilds. although i have read were some of the blower motors go into the 400hrs im sure there pretty tired. i will be down this weekend having a relaxing weekend. had all my guy's and their wifes that work for me down for a bbq last weekend about 26 people and i was wopped entertaining and all (hard work) making sure everyone is having a good time. ill be piddling this weekend wax the boat etc. hopefuly your moved into your new place and have found a place for everything by now are found everything sometimes thats a chore unpacking and all. ill look for you on the water and if your up my way stop by and ill by you a drink.

yep, i've always had a thing for that boat. i used to see it flying up and down the lake when Brian Foster owned it. i'm actually looking for a late model T/S, but old memories die hard...LOL.

i'll look you up if i'm up at your end of the lake. thanks again!

chad

JBK,
Are they trying to pass those off as stock Merc 600's? Get a serial number off the block and find out what those motors are. The only 600's I have seen were twin carbed. Merc used the 502 as the base for those motors. I'm not an expert on engines but guys I have talked to don't like running single carbs on top of blowers because the outside cylinders run lean.
Dan

those blower looks like 250s with single carbs. i have heard its an ok setup with dom 1050 or bigger but dual carbs is much better. 420 megablowers are big ole things.

Merc 600 SC- 502 CID
GM engine code stamped in block, (last 2 letters) gen IV & V-- FJ or HJ
B&M Mega Charger model 420 @ 6 PSI ratio .93:1
2- 700 cfm Holley PN 80427

candyman, puder, david - thanks for the 411. i have not questioned the owner about the discrepancies yet. i thought it was kind of funny though, all the research that i had done before i posted here, stated 502cu inch, dual 700's, w/ a 420 mega. puder, i think the blowers look like 250's as well.

thanks again. i'll keep you updated as to what i find.

chad

Are those possibly 525SC's in the picture? If so, they are 454 blocks, not 502's.

525s would have weiand blowers. Those are B&M 250s, but good point. Need to see what is stamped on the block.