22 classic -04 6.2, whipple= speed?? [Archive]

andyho

07-27-2009, 04:42 PM

Hi

Just put in a whipple in my 6.2 small block which is claimed to produce 470 hp on engine shaft.

On the stock 320 hp i ran low 60´s with a 15 inch 25p prop

now i have a whipple and a 15 inch with 27p prop and it runs high 60´s on occasion 70 flat

I had excepted at least mid to high 70´s with 50 lbs och fuel pressure and 5 to 6 lbs of boost.

The gauges might be wrong, have been struggling with the fuel regulator, any thoughts?

What about performance?

Thanks from sweden

ah

The Hedgehog

07-27-2009, 04:59 PM

It sounds like you have some tuning to do. I am no 22 expert but would think that if you are hitting the hp goal, that boat should run in the 70's with that kind of weight/power.

You should use a mechanical gauge for tuning the engine. Once done you can take it out and use the less reliable dash gauge as a proxy.

You may be running too rich. My Procharged boat would go still go into cold start mode (even after reprogramming) in the winter if I could not get the water temp over 100 degrees. Running that fat would cost me several mph. I did not run much in the winter so I did not mess with it.

There are a few whipple guys here that may be able to help you. I have heard that Dustin whipple is pretty knowledgeable, have you talked to him?

VetteLT193

07-27-2009, 06:39 PM

more fuel pressure is not necessarily better.

What do the spark plugs look like? transom? I'm guessing you have a black transom and the plugs are nuked.

you should be closer to 80... although, what is the drive ratio?

blackhawk

07-27-2009, 08:00 PM

yeller

07-27-2009, 08:14 PM

Stock HO boats (425hp) are running about mid 70's. You should definitely be seeing high 70's if you really are pushing 470hp.

BUIZILLA

07-27-2009, 08:40 PM

that thing should scream :yes:

MasterKey89

07-27-2009, 09:14 PM

So what does a 496 ho supercharged run?

andyho

07-28-2009, 01:08 AM

Yes, iam talking to Dustin Whipple. I bought the SC from them directly over the net. I am a true back yard mechanic as my sister says, which own a Midas in Bosier City, LA.

If yur ever in Shrevport/Bosier City and need a tune up just pop by, she and her husband Don will give you a good deal.

I am running stock gear ratio.

My gues is that the timeing is off by some degrees and the fuel pressure might be sightly wrong, the other factor is that i have had a nightmare with the throttle wires installaion. When first installed the Rinda scan tool read 75% on WOT, after hours fixing i finally got it to open 100% but this might be wrong?

got to go, thanks guys

BY the way my grandfathers sisters husband was Alf lysholm inventor of the twin screw SC, my dad says i didnt get those genes..

andy:sweden:

BigGrizzly

07-28-2009, 11:45 AM

If you have 50 Psi that should be fine. You did neglect to add your RPMs- very important.

andyho

07-28-2009, 03:42 PM

WOT is 4800 RPM with 50% trim on the guage

Opinions?

The Hedgehog

07-28-2009, 04:02 PM

WOT is 4800 RPM with 50% trim on the guage

Opinions?

You should be able to spin it to 5,100-5,200. Do you have a boost gauge? You should have good boost at that RPM with a screw blower but probably not peak boost.

I still think it is the tune. How do your spark plugs look?

mrfixxall

07-28-2009, 04:29 PM

Do yourself a favor,let someone who knows whipple chargers in a marine application..things can get distroyed in a hurry if tuned wrong..

Pismo

07-28-2009, 04:36 PM

What is the rev limiter set at?

The Hedgehog

07-28-2009, 05:33 PM

Do yourself a favor,let someone who knows whipple chargers in a marine application..things can get distroyed in a hurry if tuned wrong..

Yep,

Hopefully Dustin can help.

It probably has a PCM 555.

I would recommend a wide band O2 sensor and be very careful.

BigGrizzly

07-29-2009, 07:20 AM

If you think the timing is off, you violated the first rule of a blower install. this is the gravest of all mistakes. Now what gear ratio do you have? it sure is not a 1.50 to 1.
The first numbers you showed would put you just about 70. My 22 with a 1.50 and a 27 went 80 at 5200. I am guessing that the HP numbers you stated were desk top dyno numbers. If they are real dyno numbers you are dragging your anchor. Its time to get a pro involved. I see this every day desk top dyno numbers vs real world. Sorry to be so blunt but this is the real world and school is out.

Pismo

07-29-2009, 08:57 AM

If the rev limiter is set to 4800, that is your problem but I doubt it is set that low.

andyho

07-31-2009, 05:07 PM

The gear is a 1:65 which is stock
I ve located the problem with top performance;

1. the timing is slightly off will need to be fine tuned at a dyno
2. the fue regulator is not working right, iam getting to much variation 40 to 60 psi. I also found rust on the inside which is quite strange. I should read 50 psi at WOT which is right.

I am running 70 mph at 4900 which should mean that at 5200 to 5400 would give me 75 mph with optimum wieght/wind/ trim ratio

Although with a better gear ratio i might hit upper 70´s

As of the desk top HP numbers by the manufacturer that is always the case, its called marketing. When i bought the boat last year the dealer claimed 70 mph with a stock 320 HP 6.2 and my friend 496 22ft would do almost 80, he was sales guy, most boats that are in the deep V.hull and under 25 ft rarely make it by 60 mph with stock 350 or BB.

thanks

BigGrizzly

07-31-2009, 06:44 PM

Well the numbers you stat for the 70 mph is about right It sounds like your short a couple of ponies. Forget the gear change it is a wast and won't change anything. Most 6.2 stock on 18 do not achieve 70 mph. it takes more then that.

MOP

07-31-2009, 07:07 PM

I am curious in how this one will come out! Uneducated guess just a hunch 77.5 when done.

andyho

08-01-2009, 02:50 AM

I am also very interested in the final outcome, my wife on the other hand has mentioned that it deosnt matter, YOUR SELLING THE BOAT NEXT SEASON, its not a family boat:confused:

By the way the ECM & Throllte shifter deosn´t fit when installing the SC, its to narrow, deosnt say in the installation guide.

RedDog

08-01-2009, 06:17 AM

BigGrizzly

08-01-2009, 08:28 AM

This sounds like its going to be a short relationship. Either the boat or the wife. I have herd this too many times. Back to the boat, You would know if the rev limiter came on its set at about 5200 rpms. I know what the wipple and a 6.2 is capable of but you need a dyno.

BUIZILLA

08-01-2009, 08:38 AM

hi Andy.... where are you and the boat located?

never mind... I just saw your in Sweden... can't be much help there..

Pismo

08-02-2009, 02:35 PM

I think the 22 is a great family boat..I put the wife and 3 kids in there all the time, no problem. Rides and performs much better than my 25 Sea Ray cruiser which I hate.

Donzi_Dude

08-06-2009, 05:01 PM

+150HP @ the shaft for 5-6lbs. of boost on a smallblock sounds a bit optimistic to me. i dont think i have seen that done in a car so, in a boat? i think not.

:popcorn:

andyho

08-10-2009, 03:45 AM

News:

The regulator is working 50 PSI @ WOT and 45 dureing normal operation. I ran the boat @ 5000 RPM and i gave me on the GPS= 61 knots = 70 MPH which would mean may be 75 miles @ 5300 RPM

Although over 4500 there is a fuel leak in two of the manifold 3/8 screws? The permatex isnt working, opinions?

ah

The Hedgehog

08-10-2009, 08:58 AM

+150HP @ the shaft for 5-6lbs. of boost on a smallblock sounds a bit optimistic to me. i dont think i have seen that done in a car so, in a boat? i think not.
:popcorn:

Happens all the time and I have seen the dyno sheets.

andyho

07-06-2010, 09:41 AM

Hi

Now its a new season and i have finally got most of the trouble right from last year. I had the whipple kit checked out to day by http://www.hpssuperchargers.com/

and the engines runs OK acording to them, although there was a question wether the WOT would rung 26 degress in the timming? anybody know that one? I ll take to whipple today

The WOT= is 77 miles about at 5 200 RPM and i figre that is probbaly the max on the 6.2 whippe kit, there is alot of trim and lift at that speed so stabilty is so so. I beleive these boats with out stepped hules run the best at 45 to 50 miles.

I also figure the kit gives me 450 hp but alot better torque than the bigblock on high RPM ( above 4000 ). I run about the same speed with myslef or 4 adults, that not the case with the 496 which my buddy had last year.

i ll post pictures soon.

andy

Michi Besler

07-06-2010, 10:26 AM

So what does a 496 ho supercharged run?

mine goes 86 miles (2007, 22 Shelby GT, 496 HO Whipple SC)

BUIZILLA

07-06-2010, 10:50 AM

77 with a stock lower unit is about right, maybe add 1" more pitch...

with a shorty and some good steering you should see 81-82 with no problem... that's a helluva cool ride, bring it to an event sometime, i'd luv to ride in it.. :yes: I lov small blocks.............. :cool!:

Carl C

07-06-2010, 11:10 AM

Andy, good news! High 70s sounds about right to me; congrats on finding the missing speed. I think these boats run best at 70-80 :) .

osur866

07-07-2010, 07:19 AM

So what was the total net gain on this package?? Any chances of getting pictures of the way the linkage was re-routed, inquring minds would like to know ;) thanks, Steve

andyho

07-07-2010, 02:32 PM

i would say 130 to 150 HP overstock and 12 miles on top

in general the mid-range improved the most and torque of course

osur866

07-07-2010, 02:58 PM

i would say 130 to 150 HP overstock and 12 miles on top

in general the mid-range improved the most and torque of course
Can we see pictures of the linkage?? Steve

andyho

07-08-2010, 04:15 AM

send me a mail @ ah@claudio.se

and i can get the pics to, seems that the site has limitation on the size that is uploaded

what speed to you have on the boat

andyho

07-08-2010, 04:17 AM

i got it to work,

mike o

07-08-2010, 07:41 AM

Now........... Steve...... dont that look perr-ty.........:yes:........:kingme:

Carl C

07-08-2010, 08:08 AM

Is it safe to use such a long run of rubber exhaust hose?

osur866

07-08-2010, 08:27 AM

Now........... Steve...... dont that look perr-ty.........:yes:........:kingme:
Yes Sir, it does!! ;)

The Hedgehog

07-08-2010, 01:31 PM

Yes Sir, it does!! ;)

And it would in an 18 as well!

andyho

07-09-2010, 03:32 AM

I have measured the exhaust temp in the exit of the pipe and it well below a critical point, so now melting there i guess.

andyho

07-14-2010, 01:14 PM

Hi

i went to see the guys at HPS in stockholm sweden or i gustavberg were i live
http://www.hpssuperchargers.com/

We did some thinking and just some info to you guys that want to go with a blower, Check what flywheel you install on your engine, it deos a lot of diffrence on the effect, you can get between 0 and 200 HP extra out of the kit depending on the engine config. One must not forget the more boost the higher the reliability issues and major breakage situations.

The aftermarket has done a good job, but if you want more you can change the flywheel.

cheers