Who's running 75mph??????

[396_WAYS_TO_SPIT]

I am just curious to see who is running a honest 75 mph. What does your set-up consist of? What kind of hull,pump work,motor,etc. My goal is to see a honest 75mph. i just want to get an idea of what I need to do.
396

[LakesOnly]

Ford 460 .030" over in an 18 ft. Southwind Formula I jet boat. Dominator MB12S with snoot, diverter and A impeller.
79.6 mph on gps. 5400 rpm.
LO

[Jungle Boy]

396 - Sorry for copying your thread. I screwed up when trying to reply to it.

[HammerDown]

I'm closer to 80 mph. 21'Daytona 468 10:1 comp. Berk 12JG setback pump Aggressor full (A) Impeller. Ride plate 2 degrees up with a back cut shoe...At the end of the season I added a .030 shim to the shoe...it felt a little better but the pick-up blew off the speedo.
Unbelievable how much a large boat as mine responds to a few degrees up/down at the rideplate. More experimenting
to do.

[BigBoyToys]

One of our Jets ran 75+ through the lights at NJBA races this year. Syndicate T-Deck Gull wing, 476ci BBC, 12.5:1 CR, solid lifter cam @.650 lift, single Holley 830cfm on a Tunnel Ram, GM 990 heads (ported by Tim Morgan), MSD Ignition, Stock Berkeley 12JI (it's the Old Style JI, not the newer style) pump with an "A" impellor. It's not the fastest thing in the World but it got me to 75mph fairly inexpensive. I picked up about 7mph with the dual carb (750's) and tunnel ram setup and it runs in low 80's with it. It is currently setup with the single carb setup and should be able to get more mph out of it but we're not going to spend anymore $$ on this one
BTW, this boat will get very little use (if any) in the future due to a few other boats that we have purchased this year and the boat is for sale. Make $$ offer....... Might also consider a trade for ??
http://www.pritek.net/syn033.jpg

[396_WAYS_TO_SPIT]

Ok heres what I'm working with.
balanced 454 .30 over,11-1 comp,holley 850dp, ported weiand stealth intake,ported heads(781's) with 2.19/1.88,roller rockers,dry basset headers, solid lifter cam(roughly 250@.50 with somewhere around .600 lift) cam hasnt been purchased yet. 18ft kona hull with berk "e" pump with "A" impeller,flowed "g" bowl,diverter and loader.
Do you guys think I can get 75mph out of this set up? Or do I need that lil Blue bottle?I just want an idea because i am getting ready to build next week;) If I get 75mph then I will be more than satisfied;)
396

[BigBoyToys]

Originally posted by 396_WAYS_TO_SPIT
Ok heres what I'm working with.
balanced 454 .30 over,11-1 comp,holley 850dp, ported weiand stealth intake,ported heads(781's) with 2.19/1.88,roller rockers,dry basset headers, solid lifter cam(roughly 250@.50 with somewhere around .600 lift) cam hasnt been purchased yet. 18ft kona hull with berk "e" pump with "A" impeller,flowed "g" bowl,diverter and loader.
Do you guys think I can get 75mph out of this set up? Or do I need that lil Blue bottle?I just want an idea because i am getting ready to build next week;) If I get 75mph then I will be more than satisfied;)
396
Kona's typically have a hook in them. We have a Kona that Bill Scotten took the hook out of it, as well as some other bottom work, for us way back in the mid 70's. Kona's are pretty heavy too. I'm thinking that you're probably right around 60-65 (?) with current setup.

[LakesOnly]

...take the hook out.
Also, I thini your engine can handle more than 850 cfm of carb. A bigger carburetor should get some more HP out of your motor.
LO

[Bryan Rose]

Not running 75 but am running 72.6 on the GPS..... but the pump needs some work, That will happen this winter.
18.5 ft BeachComber Rebel
454 punched .30 over
tunnel ram
logs... not for long
And an engine builder who builds circle track motors who know his ST#T ,
and lots of stuff I don't know much about
Bryan

[BigBoyToys]

Originally posted by LakesOnly
...take the hook out.
Also, I thini your engine can handle more than 850 cfm of carb. A bigger carburetor should get some more HP out of your motor.
LO
I agree....Give the bottom the once over and add some carburetion. Your motor should be able to handle 2-750's. With the combination of these 2 things, I think you're there:)

[396_WAYS_TO_SPIT]

The hook is gone! My dad redone the bottom last year. actually the hull isnt that heavy. It is a little lighter that my friends kachina.
I know, I picked both of them up:eek:
396

[LakesOnly]

Originally posted by Bryan Rose
Not running 75 but am running 72.6 on the GPS..... but the pump needs some work, That will happen this winter.
18.5 ft BeachComber Rebel
454 punched .30 over
tunnel ram
logs... not for long
And an engine builder who builds circle track motors who know his ST#T ,
and lots of stuff I don't know much aboutBryan
Bryan,
You may find this hard to believe, but losing that through transom exhaust for some OT Headers will give you some serious HP. I've heard as much as (but not necessarily) an additional 80 HP is possible under optimum conditions...
There's your 75 mph.
LO

[396_WAYS_TO_SPIT]

Why more carb?
396

[LakesOnly]

Originally posted by 396_WAYS_TO_SPIT
Why more carb?
396
In my opinion, because of your approximate camshaft grind, your ported heads and your compression ratio.
By way of comparison, my 466 has ported
heads, .565/232@.050/108* cam, 10.6:1 c/r and baffled headers.
I also have a 2x4 tunnel ram with 1350 cfm or carburetors. The engine can handle more carburetion
LO

[1slowboat]

i THINK LAKESONLY HIT IT ON THE HEAD. My set up is similar to lakes and needs more carb.. this is what i have, 10.2 c/r, ported and polished heads, d3vea2a 460 heads,2.190 intake valves,1.88 exhaust, srp dished pistons,cam is .585 int,.588exh/@.050 duration of 254 int, 264 exh, wit 112 lobe separation, with a tunnel ram intake and 2 600 cfm carbs, oh ya, its a 501 stroker.needs a lot more carb. but i think if you go to a bigger carb you will see 75 or more. my boat does 75 on gps and should be faster but my hull lay up is way to heavy. hope to see how you do! keep us posted:D

[Mandelon]

I've had mine up to about 85, but it was still on the trailer at the time..............:rolleyes: :D

[Aluminum Squirt]

Buy a 19' step-tech Eagle, install stock ZZ4 SBC, presto-chango 75+MPH. Then come racing with us-Aluminum Squirt

[Aluminum Squirt]

Double sorry to 396 and Jungle Boy, I should have read ahead before I publicly made an ass of myself. I guess I was thinking the same way JB was. I won't post anymore when half asleep-Aluminum Squirt

[Jungle Boy]

Originally posted by Aluminum Squirt
Double sorry to 396 and Jungle Boy, I should have read ahead before I publicly made an ass of myself. I guess I was thinking the same way JB was. I won't post anymore when half asleep-Aluminum Squirt
It must come from aluminum poisoning our systems. It makes us very tunnel visioned. Some very big motors in some lake boats that seem to really struggle to get 60 mph. There's a need to expose some more people to these tin boats.

[MAXIMUS]

21' daytona "jet" on a good day 75+, on bad day 75+!:D

[Bryan Rose]

Originally posted by LakesOnly
Bryan,
You may find this hard to believe, but losing that through transom exhaust for some OT Headers will give you some serious HP. I've heard as much as (but not necessarily) an additional 80 HP is possible under optimum conditions...
There's your 75 mph.
LO
\
Lakes,
I have ordered a set of lightnings for the boat and at the same time and removing the heads and sending them out to get some serious port work done on them...
also going to have Tim up at proboat in the Atl. to rework the pump and add the droop I have sitting in my warehouse. All this should hopefully give me another 7- 10 MPH...
Bryan

[1tricky1]

I've GPS'd @ 74.8. Had a stock Berkeley "E" bowl and original jetovator and stock grate. Since then I've switched to an Aggressor bowl, Place Diverter, and loader grate. No numbers yet but feels like more acceleration. 454 .030 over, stock crank and rods, 9.6 cr, solid clay smith 570 lift 240 dur @ .050, roller rockers, 049 oval ports with 2.19in 1.88ex with some port work, edelbrock tunnel ram with 2 750 edelbrocks. Spinning a fresh "A" impeller 5400, so I'm guessing close to 500hp.
396, with your specs, it sounds like you could use more carb. From what I've seen, that set up of yours works well with a tunnel ram and 2 750's. Good luck!

[Liberator TJ1984]

Originally posted by Jungle Boy
It must come from aluminum poisoning our systems. It makes us very tunnel visioned. Some very big motors in some lake boats that seem to really struggle to get 60 mph. There's a need to expose some more people to these tin boats.
Just wondering what a beer can might run with a Blown BBC w about 850+ HP:confused: :p

[DansBlown73Nordic]

A note on the headers. I put a set of very old Eagle headers on my 66 Stevens. By just putting the headers on and removing the logs I gained 500 rpm,s. Im not sure on m.p.h. It made a huge difference.
I also removed logs from my Schiada and replaced them with a set of Stellings headers. I also saw 5-600 rpm,s.
Both boats feel much faster with headers.

[Jungle Boy]

Originally posted by Liberator TJ1984
Just wondering what a beer can might run with a Blown BBC w about 850+ HP:confused: :p
In A Eagle Tunnel, it would be around 115 mph+

[396_WAYS_TO_SPIT]

You guys are making me feel real comfortable about hitting my 75 mark;) Thats my goal. Its a little hight but its not impossible!
I really appreciate all of your imputs and ideas. i will be taking all of these ideas and put them into consideration.
On another note, what IF I put a 100 shot of nos to my motor? Do you guys think i can hit 75 then? Would the 100 shot be ok and safe to run? Do I need to chane alot of things(ring gap,etc)???
396

[Jake W]

396 see my post on NOs in the (Gearhead section)It will shed some light on the hall ass gas.You can thank Hammer for moving it from the just jets forum.I think from what I have read you should be fine with a 100 shot it stars getting iffy after 150 need better than stock parts retard timing and so on.Research out your funny gas kit to buy there are alot of them.
Do you have a pic of your Kona is it the Hondo style one?
Jake

[LakesOnly]

Originally posted by mouzer
What you need to do is buy (mouzers) southwind dragster.....
Well then what's the problem, Mouzer? You sellin' or what? I'm buying.
Call me
LO

[396_WAYS_TO_SPIT]

Originally posted by Jake W
396 see my post on NOs in the (Gearhead section)It will shed some light on the hall ass gas.You can thank Hammer for moving it from the just jets forum.I think from what I have read you should be fine with a 100 shot it stars getting iffy after 150 need better than stock parts retard timing and so on.Research out your funny gas kit to buy there are alot of them.
Do you have a pic of your Kona is it the Hondo style one?
Jake
i was reading that thread and I got f**kin' lost:confused: I dont need anything that says "PRO" or all out competition. All I wanna use is a 100 shot.
The hull is 1980. i dont have any pics yet. Its in my fathers shop. I will post pics on friday.
396

[Jake W]

396 the cheapest kit I found was the Eedelbrock Kit it comes with all the stuff you will need for a 50 to100 shot it is 349 from Jegs. I would splurge and extra 20 bucks and get a kit that in time you can increase the shot.Like the NX Hitman 100 150 200 kit or the Sniper kit 100 150.Both 369 from Jegs.
Jake:D

[screamdreambrad]

396, 75 today, 80 next year, 90 the year after and then.... thats right, 105! that's what i did! oh it's soooooo good! brad

[Squirtcha?]

Originally posted by Jake W
396 the cheapest kit I found was the Eedelbrock Kit it comes with all the stuff you will need for a 50 to100 shot it is 349 from Jegs. I would splurge and extra 20 bucks and get a kit that in time you can increase the shot.Like the NX Hitman 100 150 200 kit or the Sniper kit 100 150.Both 369 from Jegs.
Jake:D
Jake's right. I bought the Edelbrock kit and wish like heck I'da gotten something that would go bigger.

[Keithb87]

We were running 72 on Radar gun last summer on a tired stock 454 in an Omega and a panther.
We popped that 454 Labor Day. Just got it back together 60over high lift cam, high rise alum intake, 850 dominator carb, don't know what else , nothing done to the pump yet.
Should pick up a few MPH with all the work done to the engine.
Will know possibly this week. ;) :rolleyes: ;)
It takes forever to get a boat back to the water.

[TIMINATOR]

75 must be pretty easy! around here,(PHOENIX)its mid-pack average! ask any of the locals! :D :D TIMINATOR