7 pedal

**Merc 2.5** · 01-25-2019, 08:12 PM

So I'm thinkin what hell else can I do to my motor? Bored, then it hit 7pedal front half , when does this set up start helping , real world I'm not gonna be turnin much over 7k,short burst, 91 came stock with it , was it a runner how was bottom end, have little porting done so thought it run it little better

**Merc 2.5** · 01-25-2019, 08:17 PM

This is sumthin I'm thinkin of doin when I do a refresh next winter or sumthin, motor runs real strong as it is with the hull its pushing, but u no ,gud never enough

**texasvector** · 01-25-2019, 11:10 PM

225 promax was 7 pedal....made around 245ish on the dyno......7 pedal front help?...of course.....esp if u got large port 200 or more

more fuel/air in.....more fuel/ air out= more ponies

i run a 91 block.....7 pedal front...block opened up(260ish)....great motor

**Merc 2.5** · 01-25-2019, 11:22 PM

Nice bottom end? 1000lb bote, I should b round 240, combo I got is few mph faster than PM on same hull, (tested) with 4/5 pedal. Will I loose bottom? Or better yet would I notice a loss?
It's not a 500 or600 lb hull , and I love the bottom and mid range it has

**mach351** · 01-25-2019, 11:29 PM

My general thinking has been if it’s EFI, then the seven is a good choice all around, but with a carb motor, the five petal front seems to work well - at least to about 7500.

**texasvector** · 01-25-2019, 11:43 PM

Originally Posted by mach351

My general thinking has been if it’s EFI, then the seven is a good choice all around, but with a carb motor, the five petal front seems to work well - at least to about 7500.

i seen same 7500 on 245.....slapped laser on it on was able to gain some...but i know dick about carbs

**texasvector** · 01-25-2019, 11:48 PM

Originally Posted by Merc 2.5

Nice bottom end? 1000lb bote, I should b round 240, combo I got is few mph faster than PM on same hull, (tested) with 4/5 pedal. Will I loose bottom? Or better yet would I notice a loss?
It's not a 500 or600 lb hull , and I love the bottom and mid range it has

4/5 pedal can be strong motor.. .point blank...7pedal can achieve more HP....but every motor setup is different...its the combination of everything that makes it work....not 1 mod

like i said...u get more air going in....gotta have more air going out!
so slapping a 7 pedal front on a small port 150 prolly wont beneifit

**FORBESAUTO** · 01-26-2019, 01:20 AM

4 petal on a carbed bass boat is hard to beat. The 4 petal will be better down low, mid to upper range pretty close, and under 7500 you may not see an increase with the 7petal depending on rest of combo. With the turn in the intake the main stream of air/fuel charge is going through the area where the 4 petal reeds are with better velocity, add the extra width of the 7 and you are mainly creating a dead spot to slow velocity. The more you space the intake away, the better it helps. I’m playing with a 7 petal setup now on a Triton bass boat. Can’t say I’ve lost much mid range, but havnt gained either. Havnt stretched it out yet to know on big end, but 0-70 better with my old 4 petal motor, ain’t so sure it’s gonna get it on the big end either, just now getting jetting dialed in. Interesting, this motor didn’t want near the fuel at idle/ low rpm as my 4 petal and is wanting much more above 6500. This tends to make me believe it’s because of lower velocity down low and business picking up in higher rpm.

**Merc 2.5** · 01-26-2019, 08:00 AM

I like the top end runs alot but I like the bottom and midrange alot also . So what motor is on Triton Forbes?

**FORBESAUTO** · 01-26-2019, 08:13 AM

Click image for larger version.

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A 200 with some mild porting.

**Merc 2.5** · 01-26-2019, 08:38 AM

So which Triton do u have 18 19ft? Got any #s yet or u still building it

**Jay Smith** · 01-26-2019, 08:40 AM

If your starting with 200 with a low flow exhaust dump area don’t waste your time and money , I’m building one right now if your build started with a 225 PM the mods are endless on my shop ... The 200 hp motors have a dwarfed exit size , no matter what’s done one the induction you can’t get it out ... ( 25 years experience building these )

Jay

**Merc 2.5** · 01-26-2019, 08:42 AM

Originally Posted by Jay Smith

If your starting with 200 with a low flow exhaust dump area don’t waste your time and money , I’m building one right now if your build started with a 225 PM the mods are endless on my shop ... The 200 hp motors have a dwarfed exit size , no matter what’s done one the induction you can’t get it out ... ( 25 years experience building these )

Jay

Jay. I've got sum exhaust porting,chest, dumps opened up, so forth so on, o. And ALL the bolt ons lol

**FORBESAUTO** · 01-26-2019, 09:08 AM

It’s on a Tr-20. Haven’t gotten any numbers on it yet, just getting break in done and still dialing in fuel. The 4-petal I’m trying better had similar porting also had rectangular exits with a little less exhaust work, ran 82 with full tournament load and just shy of 85 with most junk removed with a 27 SRX. Was clocked at 70 in 600 ft with a 24 et from a 3mph roll. The whole point of the 7-petal was to try better top end and maintain mdrange. So far I am very pleased with midrange, seems a little lazier from 6k to 7k, but hoping that’s in tune (too lean).

**Jay Smith** · 01-26-2019, 09:57 AM

Dumps on a 200 can only be safely opened about 10% or you base gaskets will fail and let water enter 5-6 not enough metal at dumps to maintain gasket integrity!!

Been there and done it !!!
Call me I’ll educate you how to richen any EFI without fooling with the ECU

832 597 2603

Jay