SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: ROMPERSTOMPER on July 10, 2008, 02:39:41 PM

Title: finally finished, my new motor
Post by: ROMPERSTOMPER on July 10, 2008, 02:39:41 PM

check it out!!http://www.youtube.com/watch?v=FgHW_cJ5Wfo

Title: Re: finally finished, my new motor
Post by: ROMPERSTOMPER on July 10, 2008, 02:41:53 PM

http://www.youtube.com/watch?v=FgHW_cJ5Wfo

Title: Re: finally finished, my new motor
Post by: ROMPERSTOMPER on July 10, 2008, 02:45:29 PM

http://www.youtube.com/watch?v=DWt1PjUJb9o        ... with out nitrous

Title: Re: finally finished, my new motor
Post by: ROMPERSTOMPER on July 10, 2008, 02:47:23 PM

Ill post pictures later tonight. im so excited

Title: Re: finally finished, my new motor
Post by: HDriderTH on July 10, 2008, 03:13:23 PM

Very nice, what R the numbers?

Title: Re: finally finished, my new motor
Post by: ROMPERSTOMPER on July 10, 2008, 03:18:49 PM

1020 hp 820 torque at 6500 on the bot. 730 hp 640 torque off at 6500.  those are the two runs I posted. makes a little more at 6600. pretty good for a 468. 11.5 af-12.5 af

Title: Re: finally finished, my new motor
Post by: walshmotorsports on July 16, 2008, 02:34:51 AM

  nice, is it EFI or mechanical? It looked like a 80a belt driven pump but it also looked like a EFI fuel rail. If mech. how drivable is it going to be? Looks awsome great numbers where did you dyno it? Keep us posted on the install! "D"

Title: Re: finally finished, my new motor
Post by: 2savage4you on July 16, 2008, 07:36:22 AM

How about a little info on the internals.......I want to build a 468 as my next motor and some tips would be appreciated ;)



Also sound like your new engine would eat up some Fords with no problems >:D
 Ha but who want indegestion ;D


2sav ::)

Title: Re: finally finished, my new motor
Post by: Jason1978nordic on July 16, 2008, 11:30:58 AM

HAH,I got a ford you can try to eat 2 sav.....bitchin soundin mill good luck............

Title: Re: finally finished, my new motor
Post by: 2savage4you on July 16, 2008, 01:37:04 PM

Quote from: Jason1978nordic on July 16, 2008, 11:30:58 AM

HAH,I got a ford you can try to eat 2 sav

There will be a day, when the BBC gets the respect that it deserves, and you can be the first victim ........Potato boy ;D

2sav O0

Title: Re: finally finished, my new motor
Post by: ROMPERSTOMPER on July 16, 2008, 02:45:42 PM

Thanks first off thank you. It is a FAST EFI XFI running on full sequincial. then  the pump is a vacume pump by morosso. Its recemended for high boost motors with a lot of blow by. nitrous = boost by the way. Instead of oil being pushed out of the valve covers air is being sucked in. it also inshures proper ring seal and i picked up 20 hp and a better idle with it. The block is a 4 bolt 454 60 over. steel crank 1010 grind. h beam cromolly rods and probe 12-1 forged pistons. it is a standerd stroke. The low end is pretty basic. Wish I went with the 540 but had most of it. The heads are the RHS 360 cc ported with all the best internals and shaft mount rockers. The cam is a custom grind from speed o motive. Im not shure of the the duration cause im in my office rite now but i think its a 48 at 50 thou and a 707 lift. The intake has a lot of work into it. Its a weind hi ram machined for injector bungs and a blower riser where the nitrous injectors are located.. On top of that is a bug catcher used as the throdle body. the fuel rails are custom made to for two cilinders a piece and the fuel lines are criss crossed. we did this so there would be full fuel pressure at all injectors at all times. The injecters are 72 pound. The nitrous system is from NX It is a dry system meaning it only injects nitrous in the motor not fuel. The ECU is programed so when the nitrous is triggerd the fuel injectors add more fuel. It is also programed to come on and off at 90% throdle or 7000 rpm by a simple arming switch. It does have a seperate purge switch as well. Im shure I left some stuff out just ask if you have any questions. Sorry bout the spelling lol. JIMMY.

Title: Re: finally finished, my new motor
Post by: ROMPERSTOMPER on July 16, 2008, 06:48:46 PM

pics,,,

Title: Re: finally finished, my new motor
Post by: Marcsrollin on July 16, 2008, 11:23:45 PM

WOW!! :o :o :o  That much horse power in a quarter stringer boat? Let me know how that goes! I have been looking for a new boat cause I was told the quarter stringer boats were not ment to handle much more than 500 hp.

Title: Re: finally finished, my new motor
Post by: ROMPERSTOMPER on July 17, 2008, 02:53:19 PM

Hope to God it holds together. Ill let the forum know. Planning on filming it run.

Title: Re: finally finished, my new motor
Post by: GT Jets on July 17, 2008, 06:10:17 PM

You would be suprised at how strong some of those short stringer boats are, a lot of times the only reason some  boats have full stringers (with a few exeptions) is because they are a lighter lay up, most of the quarter 'stiffie boats are layed pretty heavy and have a lot more glass in the bottom, I'm sure there are some exeptions, but I have seen some pretty badass blown big block quarter stringers running around with little or no problems.

Just my opinion though...

Title: Re: finally finished, my new motor
Post by: beerjet on July 17, 2008, 09:08:29 PM

Is that a chevy steel crank ? Fukin beautiful dude ! That induction system has always been a favorite .

-beerjet-

Title: Re: finally finished, my new motor
Post by: beerjet on July 17, 2008, 09:13:07 PM

Quote from: walshmotorsports on July 16, 2008, 02:34:51 AM

   where did you dyno it?

Quote from: ROMPERSTOMPER on July 10, 2008, 02:45:29 PM

  http://www.youtube.com/watch?v=DWt1PjUJb9o      

The writing is on the wall bro .  ;D

-beerjet-

Title: Re: finally finished, my new motor
Post by: koyota93 on July 17, 2008, 11:16:30 PM

That thing is mean. I'm definitely jealous.