I dont know anything about what you would built it with but I know a guy who has a open flathead for sale. It is a blossom racing engine that would be ran on a jr dragster.What all parts and machine work would you need to build or have built a open flathead? I have 6 flatheads but weigh entirely too much to run flathead class...
Pm me detailsI dont know anything about what you would built it with but I know a guy who has a open flathead for sale. It is a blossom racing engine that would be ran on a jr dragster.
Thats what i am wondering as well... i am in no hurry to build it just maybe acquire parts for nowDoes an open flathead have any OEM parts?
I have a predator 212 that I was told it would be a beast in the small block open class and we had it built for about 900. It has different ratio rockrs that are adjustable and roller rockers and dual valve spring and a billet rod and a aftermarket cam and billet flyhweel and a alcohol carb that is for a predator 420. I know of some people that race that have 2500 in a motor and some with 5000 dollar motors and they both stay towards the front.The options are endless when it comes to an open build.
Standard Raptor style block, all billet block?
Stock stroke, .500 stroker?
.060 bore, .160 bore?
380 lift cam, 460 lift cam?
Tillotson, Mikuni?
At the end of the day it all boils down to how deep your pockets are and how BIG you really want to go.
Just saw an Open Flathead posted the other day for $5000.
Pick your poison.
So basically i should just let the flatheads sit and buy a kt100 or something more affordable... i know where there is a kt100 for a reasonable priceThe options are endless when it comes to an open build.
Standard Raptor style block, all billet block?
Stock stroke, .500 stroker?
.060 bore, .160 bore?
380 lift cam, 460 lift cam?
Tillotson, Mikuni?
At the end of the day it all boils down to how deep your pockets are and how BIG you really want to go.
Just saw an Open Flathead posted the other day for $5000.
Pick your poison.
YUK! Why would any sensible American racer do such a thing? LOLSo basically i should just let the flatheads sit and buy a kt100 or something more affordable... i know where there is a kt100 for a reasonable price
I was gonna build an open to run rwyb or maybe uas... but if it costs that much i might as well find a wrecked 4 wheelerGood advice here .
Your definition of open is the biggest factor . If by open you mean won't pass tech , heck ya do it .
Big valves , big cam , big pipe , big bore .100 , flywheel and a tilly .
Bam your done .
Does an open flathead have any OEM parts?
Does an open flathead have any OEM parts?
You’ll mostly see blockzilla and terminator blocks running in the 14.5 open modified class. They can be pretty exotic little engines. The only oem Briggs stuff would be the bearing and seals. The pictured engine, has a welded on fully cnc ported “tunnel port” and matched billet manifold, billet cylinder head with relocated pattern, custom cut titanium small stem valves with custom lightweight aluminum retainers, mikuni tm33 carb with bypass valve, and one of my camshafts. You race them at 10,200-10,500 but we have turned them up to 11,000.What all parts and machine work would you need to build or have built a open flathead? I have 6 flatheads but weigh entirely too much to run flathead
I am no expert and I dont know much about open motors but how much power does that motor in the picture make?You’ll mostly see blockzilla and terminator blocks running in the 14.5 open modified class. They can be pretty exotic little engines. The only oem Briggs stuff would be the bearing and seals. The pictured engine, has a welded on fully cnc ported “tunnel port” and matched billet manifold, billet cylinder head with relocated pattern, custom cut titanium small stem valves with custom lightweight aluminum retainers, mikuni tm33 carb with bypass valve, and one of my camshafts. You race them at 10,200-10,500 but we have turned them up to 11,000.
On both my inertia and water break a good one makes 24hp. In retrospect most people’s 14-16 hp clones make 9.5-10.3 hp on my dyno. So these flatheads on the current kart industries exaggerated dynos would be in the 30’s. A good 14.5 ci ohv with a billet head makes 33-34 hp on my dynos. Which would be in the 2.3 hp per cubic inch range, which is a believable good number for a pushrod racing engine.I am no expert and I dont know much about open motors but how much power does that motor in the picture make?
Man thats a lot more power than the predator class i am gonna run to start out which each kart makes only like 9hp.On both my inertia and water break a good one makes 24hp. In retrospect most people’s 14-16 hp clones make 9.5-10.3 hp on my dyno. So these flatheads on the current kart industries exaggerated dynos would be in the 30’s. A good 14.5 ci ohv with a billet head makes 33-34 hp on my dynos. Which would be in the 2.3 hp per cubic inch range, which is a believable good number for a pushrod racing engine.