Vertical Front Cut

**nitro_rat** · 08-25-2019, 03:02 PM

Anybody know off hand how much you can cut a vertical front half? I was talking to Chris Carson and he said that the horizontal front has more than double the volume of the vertical and I believe it! I've never had a problem getting RPS's out of vertical 2.0's so I'm just wondering how much it's safe to shave the front...

**Merc 2.5** · 08-26-2019, 02:50 PM

R u stuck on vertical front? , what bout throwin horiz on it?

**89Talon18** · 08-26-2019, 05:28 PM

Just curious about how much rpm you have seen from a vertical reed intake? Not trying to a smart guy just looking to learn

**nitro_rat** · 08-26-2019, 06:16 PM

Originally Posted by Merc 2.5

R u stuck on vertical front? , what bout throwin horiz on it?

I have all the stuff to go horizontal, there are a number of reasons why I don't want to...

Originally Posted by 89Talon18

Just curious about how much rpm you have seen from a vertical reed intake? Not trying to a smart guy just looking to learn

Over 8,000

**Dave S** · 08-26-2019, 11:34 PM

Like ya don't have the rod that goes to the carbs?????? It is longer on Hozzzz????No other reason not to go Hozzz.....Easy 25 hp......Air box??? I have.....Why stay Vert????

**gotboostedvr6** · 08-27-2019, 07:50 AM

Vertical uses a **** ton less fuel. Better torque low rpm.

**nitro_rat** · 08-27-2019, 08:20 AM

Originally Posted by Dave S

Like ya don't have the rod that goes to the carbs?????? It is longer on Hozzzz????No other reason not to go Hozzz.....Easy 25 hp......Air box??? I have.....Why stay Vert????

I have the rod (yes it's longer on a horizontal front), also found an intake in my stash. I have the whole setup. I've got a set of 4 petal cages and TDR reeds ready to go. Just not the direction I'm headed with this one. I may build that one someday but not today...

The horizontal airbox and latch really f*** up a clamshell cowl. This old Varmint has always run great with a stock 1750 on it and that's the way I'm going to keep it!

Click image for larger version.

Name: 0F7F5580-036F-45B8-A921-6630CFCC941E.jpg
Views: 16
Size: 437.4 KB
ID: 447498

**Dave S** · 08-27-2019, 08:36 AM

Ok.... just tezzzin ya......

**1978allison** · 08-30-2019, 09:12 AM

Do you need a clam shell cowl?

**nitro_rat** · 08-30-2019, 10:21 AM

Originally Posted by 1978allison

Do you need a clam shell cowl?

I have PILES of them!

They are prohibitively expensive to ship anyway.

**rjdubiel** · 08-30-2019, 10:26 AM

Originally Posted by nitro_rat

I have all the stuff to go horizontal, there are a number of reasons why I don't want to...

Over 8,000

Nitro, I have a stock 1978 1750 that was in a time capsule and I was wondering if you did anything to the porting or anything at all to the vertical motor you turned 8K? It has been on a stand since 2008 and wanting to get it up and going next year.

thanks
RJ

**nitro_rat** · 08-30-2019, 03:31 PM

Originally Posted by rjdubiel

Nitro, I have a stock 1978 1750 that was in a time capsule and I was wondering if you did anything to the porting or anything at all to the vertical motor you turned 8K? It has been on a stand since 2008 and wanting to get it up and going next year.

thanks
RJ

Mercury dino oil at 32:1, 91 octane 10% ethanol gas, boyesen reeds, other than that all stock!

**rjdubiel** · 08-30-2019, 03:35 PM

I think I am going to pull mine down this winter and put together a 2.0 hydrostream Viper for spring. I also have my Vking what will get a 2.5 by spring. Thanks for the info Nitro!

**Dave S** · 08-30-2019, 06:26 PM

I buy a 3/4 inch ball ...greay stone.......start off in the exhust ports.... as stone gets smaller I go to the 3 rd port..... as it gets small enf..... the 2 cross ports...As it gets small ya can finish off the work....at the end it is to a stub.....I use a Cheep BD drill with a 12 inch extenson with a tub to hold at the cutter end. I Have a BP mill so I can do all the rest easy..... but ya still best off with a rat tail on the top of exhust ports....not on the cly wall but where it bends on top...... JMO...I don't D port....the piston hole..... I blend it smooth.....A ball and Rat tail is all ya realy need ... The mill is next step...up.....