Bridgeport torque settings

[baj666]

intresting thread

[Hydrostream]

Originally Posted by Techteam

Succinct and to the point as always Steve, UK and US MOD VP was slightly different due to the time. Northern VP racing was probably the coolest meanest mod racing in the UK some of those boats really flew. Boats got lighter and lighter but the speeds peaked. Enter MOD VP the last of the 2.4 Nikasil bridgeport motors replaced the earlier 2.4 oval/fingerports which had been the thing to have very late 80's and speeds jumped by 35mph. Enter the chequebook and some of the new breed of MOD VP drivers had money to burn so a lot of 2.4 were cut with a VERY limited life. S2000 killed off MOD VP in the UK a shame as it was a good class.

How big was modVP racing in the UK? I would have loved to race that class.
We have never realy had any big powerboat racing over here, not since the 80's early 90's. Hopefully this is changing now..


Agree, We've never had a bridgeport last too long and have about 4 in boxes under the bench, cool motor but has no balls compared to a 2.5.

Also have a set of 180psi heads for a bridgeport if anyone is looking for them.

[martynwilley]

yeah thanks everyone, learnin loads!

the heads on it do look the same as my 1st gen 2litre xr2 heads on my old spare 150 powerheadn (2 piece).

so whats the correct way of compression testing then?
an yeah the pistons already have a flat 'cut out' and holes in them

so could i in theory shave the head so it pushes 175psi an run aviation fuel premix to make this a stonking fast motor? or am i better just sticking round the 125psi and pump fuel?

what hp would it be at 175psi an av fuel?

[steve h]

Originally Posted by martynwilley

yeah thanks everyone, learnin loads!

the heads on it do look the same as my 1st gen 2litre xr2 heads on my old spare 150 powerheadn (2 piece).

so whats the correct way of compression testing then?
an yeah the pistons already have a flat 'cut out' and holes in them

so could i in theory shave the head so it pushes 175psi an run aviation fuel premix to make this a stonking fast motor? or am i better just sticking round the 125psi and pump fuel?

what hp would it be at 175psi an av fuel?

wot does it say on head cast in a small circle if 2 piece hemi heads,3 3/8 or 3 1/8

[larby]

Originally Posted by martynwilley

yeah thanks everyone, learnin loads!

the heads on it do look the same as my 1st gen 2litre xr2 heads on my old spare 150 powerheadn (2 piece).

so whats the correct way of compression testing then?
an yeah the pistons already have a flat 'cut out' and holes in them

so could i in theory shave the head so it pushes 175psi an run aviation fuel premix to make this a stonking fast motor? or am i better just sticking round the 125psi and pump fuel?

what hp would it be at 175psi an av fuel?

To me the main difference will just be how spectacularly it blows up

[martynwilley]

ok so heres a pic or the 2 sets of carbs i have.

the 1's on left are 2.5 carbs and the right are the 1's from the bridgeport.

the 1's form the bp have some of the air screws missing and the 2.5 1's have none at all? do i need to get a set or do the motors run without?

also both sets of carbs are mercarb. they look almost identical as you can see the 2.5 set is a lot cleaner, could i just swap all the jets and use the 2.5 carbs?

[martynwilley]

Originally Posted by steve h

wot does it say on head cast in a small circle if 2 piece hemi heads,3 3/8 or 3 1/8

they say 3 3/8. what does this mean???

[Hydrostream]

Carbs may look the same but the circuitry may be different. What is the number on the top of the carb behind the steel plates. It should read WH-??

The jets in the top of the carbs are bowl vent jets. You can run without them if you like.

3 3/8 on the heads is the cylinder bore size. 3 3/8" for a 2.4L, 3 1/8" is a 2.0L and 3 1/2" is a 2.5L.

[Grorcego73]

I found the spindle torque in the PDF manual in the "suspension" section. Again, kudos to the dude who scanned the manual and posted the PDF.

[Hydrostream]

Originally Posted by Grorcego73

I found the spindle torque in the PDF manual in the "suspension" section. Again, kudos to the dude who scanned the manual and posted the PDF.

Where is that?

[FrenchPhil]

Where's the pdf ?

Originally Posted by Grorcego73

I found the spindle torque in the PDF manual in the "suspension" section. Again, kudos to the dude who scanned the manual and posted the PDF.