2.4 bridgeports

[Steve Pope]

Has any one had experience with 2.4 bridgeports that have been modified for behind the liner porting and if so, what did it go like????
Popey

[MARINER RACING]

i have built bridgeports with no work done in the bore
but doing work in the piston,front half and exhaust chest
using a 7 peddle efi front cut.100 and using a 260 reed block with carbs

made a killer motor

[YELLOWSS]

i agree i had a efi bp with carbs, opened up exhaust. 260 reeds. i had lightend and balanced pistons, and rods. i think it pulled as hard as my 260!!
reved up in a hurry!!!!! at 8000 it felt like 6000. it begged for the rpm's.

[MARINER RACING]

Some of the later bridgeports have the same port heights as the 2.5/260 and were nicasil...GREAT MOTOR !

[YELLOWSS]

mine was a 89. but it has all steel cyl. the guy i got it from put them in it.
they run great. 800' or less. it's hard to run with the big boys on the top end with a bp. you better have a light rig, and wind her up. great motors anyway.

[Martymarr76]

I don't know about all that but I just rebuilt a BP with 140 psi, boysen reeds. aluminum tuner, drilled out exhaust, aluminum flywheel, jetted carbs some other minor adjustments like a 150 lower unit and she screams!!!! Tight motor, love it! I have had evenruuuuuudes, and Mercs and I love my Bridgeport wouldn't trade it for nothing!!!!!!!!!!!!!!! They where made to run!!!!

[pyro]

I think he's looking for specific info on a Bridgeport with specially-modified behind-the-cylinder-liner intake charge porting. A dozen testaments on how various BP's run with stock and cut heads, isin't going to help. I've got a BP too, so what?

Rumor has it that there were a few behind-the-liner 2.4 motors made from the factory, not sure about custom jobs...

[Martymarr76]

I think he's looking for specific info on a Bridgeport with specially-modified behind-the-cylinder-liner intake charge porting. A dozen testaments on how various BP's run with stock and cut heads, isin't going to help. I've got a BP too, so what?

Rumor has it that there were a few behind-the-liner 2.4 motors made from the factory, not sure about custom jobs...
Do you like your Bp, sounds like your not happy? Maybe a 260?

[pyro]

I love mine, but since it does not have the specific modification that the thread author is asking about, there was no need for me to post another testimonial on a totally different motor.

Ah dammit, look at what you made me do!

[CRMERC]

mine is a 1989 block with an 81 225 14 pedal reed cage front. I have a 225 promax power head with light mods as well. Have had both powerheads on same boat. On a heavy hull the pro max works better but on anything light I would take the bp. Has been very reliable changed rings at 300 hrs and it just keeps going.

[Superdave]

Tube it!

[pyro]

mine is a 1989 block with an 81 225 14 pedal reed cage front. I have a 225 promax power head with light mods as well. Have had both powerheads on same boat. On a heavy hull the pro max works better but on anything light I would take the bp. Has been very reliable changed rings at 300 hrs and it just keeps going.

Tell us more about the behind-the-liner porting in your motor. :rolleyes:

[pyro]

probably should have put "behind the liner 2.4" as the subject line.

People will blah blah blah about their cool stuff without reading any of the existing posts in the thread, two pages later we'll still be reading more "my stock BP runs strong" posts. sigh...

It's kinda like Robin Williams in the movie "Patch Adams", where he's rambling on to his hospital psychiatrist about "using his penis as a pogo stick", while the doctor goes "uh-huh", nodding his head...

[fyremanbil]

Steve, John Marles (US1) makes them, I think starting with the old F1 2L engines. If I remember, there were some that were based on the 2.5 block that had bridged exhaust ports.

[CRMERC]

I have seen two that had been tubed (modified) both out on long Island. One at Diamond before they went to florida and one at chips shop his last name I forget. Chip was a big racer out at the parker enduro so he probaly got the idea from something he heard of saw out in parker. today it would not be worth the effort to make one when you can just buy a 2.5.

P.s. pyro thanks for your delightful response dick head:)

[Steve Pope]

I was hoping someone had actual experience with behind the liner 2.4 s. I have raced BP2.4 s for years and have a real soft spot for them. Over here in Kiwi Land a 2.4 f1 boat gets a 150 lbs weight break over a 2.5 so I figure a 2.4 behind liner derived from a 2.5 block could make for an interesting match up with a 2.5????

[T-REX]

Steve, There were a couple guyz in ODBA that run tha behind tha liner 2.4's(tube motas)...Rodney Nance run one in Pro Carb, az did David Hardin, the 2007 High points/world champ in Pro Carb...Now I know that David run a fingerported 2.4 @ Jasper with a weight break, and it also flew, so ya wunder juss how much wuz mota, and how much wuz metickulous testing and set up!!!...U have to know David to understand...

When Rodney run hiz tube mota/quartermaster in Pro Carb, he wuz a force to be reckond wit!!!....

I built a behind tha liner mota, but a set ov 2liter hed gaskets ended it'z life before I could truley evaluate it'z full potential:(

[jay1]

little more detail on that??????....:rolleyes:

[T-REX]

little more detail on that??????....

On what??:rolleyes:

[jay1]

tube it ....what does that mean... the term tube it???

[us1]

Steve
I have build 2.4s and 2.5s out of F1 2.0L BP behind the liner motors. My 2.4 BP behind the liner motors will run just like 2.5 behind the liner motor. The 100 cubic inch difference between the 2.4 and 2.5 is not a big difference. Its all in the the behind the liner technology. I got your messages but you never left your number. I was out of town for a few days when you called.

[T-REX]

Tube iz a "Behind tha liner" passage for a piston port mota...It takes a lot ov work(cutt'in/weld'in/epoxy'in etc, but it does make a differnce.....My opinion, on tha river, unless U a machinest wit aluminium welding exsperience, and are totally bored wit nutt'in to do, leeve it be!!....Find a 2.5 block and build on it, or juss cut ya 2.4 and leeve it a piston port mota!!...Juss my non professional opinion!!:D