So what will get me another 100 hp?

« **Reply #25 on:** October 03, 2007, 03:38:07 PM »

Quote from: hotrod56cars on October 03, 2007, 03:31:59 PM

Legal Chemistry may want all of the info on your "never been touched" tunnel ram set-up. Not to jump on your back or throw you under the bus but... I read nothing in the above post that tells the story of 3' flames shooting out of your two carbs! I saw it more than just a few times. Maybe he doesn't want flame thrower's serving as carbs

As far as the "matched carbs" and "not just two of the same kind", I'm calling BULLSH!T. If you are refering to the two carbs needing to have the same jet sizes, accelerator pumps, etc... then yes, a matched set is required. BUT if you are refering to "matched set" of carbs built by Holley with different metering blocks and all of that other crap you saw on TV - BULLSH!T.

I think he's talking about core shifts straight from Holley, kind like cylinder heads. Maybe?

« **Reply #26 on:** October 03, 2007, 03:57:36 PM »

Quote from: hotrod56cars on October 03, 2007, 03:31:59 PM

Legal Chemistry may want all of the info on your "never been touched" tunnel ram set-up. Not to jump on your back or throw you under the bus but... I read nothing in the above post that tells the story of 3' flames shooting out of your two carbs! I saw it more than just a few times. Maybe he doesn't want flame thrower's serving as carbs

As far as the "matched carbs" and "not just two of the same kind", I'm calling BULLSH!T. If you are refering to the two carbs needing to have the same jet sizes, accelerator pumps, etc... then yes, a matched set is required. BUT if you are refering to "matched set" of carbs built by Holley with different metering blocks and all of that other crap you saw on TV - BULLSH!T.

Call holley and ask for yourself if you don't believe me!

And the back fires were my fault not the carbs!

« **Reply #27 on:** October 03, 2007, 04:10:34 PM »

Yeah... 3' flames are cool, but not on my boat

I'll see if I can find the specs on the cam in there now and would appreciate any suggestions for another (without worry about reversion).

One fatty cam and new carb sounds like a good start to me. Shouldn't break the checkbook too bad. The stock manifolds will have to due with jacketed headers running several k!

gotta keep the engine covered for the dance platform:

« **Reply #28 on:** October 03, 2007, 04:17:21 PM »

Quote from: Marcsrollin on October 03, 2007, 03:57:36 PM

Call holley and ask for yourself if you don't believe me!
...

I don't believe you. Got Holley's number?

Legal Chemistry, what RPM's does your engine have at Wide Open Throttle? W.O.T.

« **Reply #29 on:** October 03, 2007, 04:47:58 PM »

You don't need Aluminum heads if you already have a set of new Square ports. Go to a bigger roller cam and upgrade to a 950 hp (i think they are called 1000 Hp's now)
The cam and carb change will net you you 100 hp gain....without a problem.

« **Reply #30 on:** October 03, 2007, 04:49:15 PM »

Quote from: hotrod56cars on October 03, 2007, 04:17:21 PM

I don't believe you. Got Holley's number?

Legal Chemistry, what RPM's does your engine have at Wide Open Throttle? W.O.T.

1-866-goholley SORRY FOR THE THREAD JACK!!

« **Reply #31 on:** October 03, 2007, 04:58:23 PM »

a 950? really with only 500hp? I'm just curious as to what the advantage would be?

« **Reply #32 on:** October 03, 2007, 07:03:36 PM »

'Rollin... it's a Dom 12s with an "A" ~4800 rpm or so.

Thanks for the compliment UNDONE... not a hot rod but still puts me on the water.

So I'm looking through some paperwork and it may be 8.8 or 9.0:1... more boost friendly than I thought. The only issue with going with a blower is the rear seat will need to be moved. Not really an option.

Any suggestions to cam/carb combo? An 850dp should do the trick up to 500hp?

« **Reply #33 on:** October 03, 2007, 07:38:09 PM »

Quote from: UNDONE on October 03, 2007, 04:58:23 PM

a 950? really with only 500hp? I'm just curious as to what the advantage would be?

I've ran a tunnel ram on 500 hp that totaled 1320 cfm. Worked great!!
It's not how much HP you make that dictates what carb to run, it's the carb that dictates how much HP you make. Yes similar power can be made with an 850, but why buy the smaller carb when the need for the larger one will come later down the line. The HP series carbs are far more adjustable than a regular Holley. Better throttle response and more mid range power.

« **Reply #34 on:** October 03, 2007, 09:05:05 PM »

I have to agree with Quickjet's opinion/posts. He's actually worked with this kind of sh!t and I've only read about this sh!t.

Makes sense though. Hey Q-jet, how about a cam and intake recomendation from you?

Quote from: Marcsrollin on October 03, 2007, 04:49:15 PM

1-866-goholley SORRY FOR THE THREAD JACK!!

Got it. I'll call them late tomorrow afternoon.

« **Reply #35 on:** October 03, 2007, 10:42:53 PM »

yea...do all that, then add the Procharger

« **Reply #36 on:** October 03, 2007, 11:52:38 PM »

Quote from: hotrod56cars on October 03, 2007, 09:05:05 PM

I have to agree with Quickjet's opinion/posts. He's actually worked with this kind of sh!t and I've only read about this sh!t. Makes sense though. Hey Q-jet, how about a cam and intake recomendation from you?

Got it. I'll call them late tomorrow afternoon.

Thanks Hot Rod.....

I'd run the Victor intake, 1000Hp carb, and a .670 roller with 260 durration @ 50 and a set of roller rockers.
The motor will make 550- 575 hp with that combo, possably more.

« **Reply #37 on:** October 03, 2007, 11:55:02 PM »

QJ , how fast is your boat? ( I am not thread jacking there is a point )

« **Reply #38 on:** October 04, 2007, 09:52:34 AM »

Quote from: Marcsrollin on October 03, 2007, 11:55:02 PM

QJ , how fast is your boat? ( I am not thread jacking there is a point )

122 on motor. .

« **Reply #39 on:** October 04, 2007, 10:38:22 AM »

Quote from: Quickjet on October 04, 2007, 09:52:34 AM

122 on motor. .

Now that's the person I would listen to!

« **Reply #40 on:** October 04, 2007, 10:43:53 AM »

Quote from: Marcsrollin on October 03, 2007, 11:55:02 PM

QJ , how fast is your boat? ( I am not thread jacking there is a point )

Quote from: Quickjet on October 04, 2007, 09:52:34 AM

122 on motor. .

Point well taken!

« **Reply #41 on:** October 04, 2007, 12:02:01 PM »

dont you have a v-drive too Qjet?

« **Reply #42 on:** October 04, 2007, 12:13:24 PM »

Quote from: Quickjet on October 03, 2007, 11:52:38 PM

Thanks Hot Rod.....
I'd run the Victor intake, 1000Hp carb, and a .670 roller with 260 durration @ 50 and a set of roller rockers.
The motor will make 550- 575 hp with that combo, possably more.

Thanks Quickjet... your numbers are impressive. Again, I'm new to most of this stuff. What is involved w/upgrading the cam? New lifters, springs, etc,

? I have little knowledge about changing hydraulic to solid, so why not stay hydraulic and use the existing parts with a larger cam (or is that not even an option???) What will be the trade off from my current setup, bad idle or

With your recommendation you'd guess ~550hp, that's a great number -but will my bottom end hold up? For a relatively simple solution that seems like a big gain!

Again, still learning here -so gathering the information now to set the budget. An idea of what the cost will run? I know I won't do this on own w/my lack of experience.

Thanks!

« **Reply #43 on:** October 04, 2007, 01:22:56 PM »

Let me clarify a couple things. The 122 is in my V-drive. That's a Dave Riolo engine that I didn't build. I bought the boat turn key. The motor makes roughly 890 hp. I know that may disscredit me in some eyes but I'm being honest.
I would also never reccomend anything that I wouldn't or havn't ran myself.
When I was running my jet boat (which I have sold) I ran a combo similar to the one I reccomended to Legal Chemistry. The only difference wasI used a solid flat tappet cam instead of the roller. That motor made just under 600 hp with a set of 990 square port heads, 11-1 compression and an old TR-2 Edelbrock tunnel ram with 660 center squirters and an Isky Z-89 camshaft ( .636 lift 256 durration @ .50 ground on a 108) That motor ran 85 mph in my Bahner.
That same combo with 8.75 compression in my Bahner jet ran 83.7 mph all day long on pump gas.
I couldn't afford a roller a the time, however it was known that it would most likely pick up another 30- 40 hp with the cam change alone.
The heart of any engine are the heads and camshaft topped off with the right carb(s). The bottom end is along for the ride.
That bottom end should hold up fine. Yes you will be in another RPM range however the pump will keep you safe from catostophic failure.
You will love the power, throttle response and the oohs and ahhs you get everytime you fire it up.
A set of water jacketed headers in the future wouldn't hurt either....

« **Reply #44 on:** October 04, 2007, 07:11:49 PM »

Looks like Q-jet just gave up a 550+ HP combination for the Chevrolet big block.

« **Reply #45 on:** October 09, 2007, 10:47:10 AM »

Quickjet, thanks for your input -it is appreciated. Any downside to this combination? Jacketed headers would be nice but $$$$

I just got back from Havasu... damn it was nice. The weather has cooled down and the speed picked up. Boat ran great, a constant 4900-4950 rpm all day long.

SO with that being said, what is the parts list to get 'er done? The cam above (.636 lift 256 @.50, 108 degree.) and carb? I'll have to send this out to be worked on -so what else should I expect to add to the list? Estimated cost or SoCal

Anyone?

« **Reply #46 on:** October 09, 2007, 10:02:47 PM »

Of course...you could always do a 100HP shot of funny gas!

« **Reply #47 on:** October 16, 2007, 11:52:37 AM »

Thanks for the feedback... I looked around for some more info and a little feedback led to reversion w/the cam above (636 lift 256 durration @ .50 ground on a 108) Can anyone else comment on this? This will be running on stock Merc manifolds. Also what was the power band for that cam? I'd like to stay below 5500 and keep the A impeller... is that possible?

A bottle of the funny gas would just leave me laughing my arse off all day passed out in the cove!

pw_Tony

Marcsrollin

Legal Chemistry

hotrod56cars

Quickjet

Marcsrollin

UNDONE

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HDriderTH

Quickjet

Marcsrollin

Quickjet

Marcsrollin

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UNDONE

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hotrod56cars

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Jetaholic

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