Hey. I've been a lurker but this is my first post.

For any of you who have a Vanguard 37 EFI, what kind of RPMs are you getting? I'm under the impression the rev limiter is at 4750. Is that correct?

I know that all the different LUs and props will change final RPMs but I'm curious. I've got a mud buddy HD with a big blade. Maybe the Nat Gear paint is affecting RPM's. Since I'm not real clear where the rev limiter is, I try not to find it. I can get 4400 RPMs if things are just right. I don't stay there because floating the valves doesn't make a good day. Is a stock motor supposed to turn that fast?

I have a 37 efi on a GT and I turn 4500 every time I use it I make some long runs at high rpms no problems. As far as the Rev limit 4750 sounds about right.

Best way to check it is in neutral wide open. Should be 4700. For comparison I am running a gtr with 11p 3 blade at 42-4300.

Sent from my SM-G900V using Tapatalk

Thanks for the feedback fellas. I'd heard that stock carbed engines "should run about 38-3900 in the water." I kinda baby my stuff, so leaning on the Rev limiter makes me a little nauseous. Those logs and stuff do the same thing but, hey, that's why I got it! For comparison's sake, what does a stock 35 turn?

MY 37 EFI GTR was running 4100 RPM this morning WOT with a two man hunt load.


Sent from my iPhone using Tapatalk

definitely the nat gear paint

Mine turns 4000-4050 with a stock GD 3 blade prop. I've hit the limited getting out of a stuck before, you can hear the valves float but I don't think it's a huge issue unless you're just sitting on the limited for an extended period of time.

my cousin just got a 17x54 gt extreme with a 37efi that has a stage two or whatever hoyt did and it turns 4700 all day. first day we took it out he looked at me when it got to about 4750 and let off. we were kind of scared to do more but it will. he called hoyt said 4800 it should hit limiter

Bps now makes a tuner for the Briggs efi. setup for there own recipe of mods.
http://www.backwaterperformancesystems. ... ath=67_196

I knew about bps programming, he said it was installed by Hoyt.

Sent from my SM-G900V using Tapatalk

No shit. I didn't. Now I do. This is for the factory EFI?? I think I'll wait for my warranty to expire so that the kinks can be worked out.

I know more power is always welcome. But I am more than pleased thus far with my 37 in stock form.

Sent from my SM-G900V using Tapatalk

I've been pleased, too. But this is my first surface drive so I have nothing to compare it to. Yesterday was my first real loaded scenario. It did fine...great even.

What he is referring to is most definitely not BPS


Sent from my iPhone using Tapatalk

When my 37 was stock with gt 2 blade, I would get 4300, i recently upgraded to cam and heads with bps tune, and can easily hit the govener at 4750. I will be posting a full review in a few weeks comparing the stock and modded 37, I still and testing with differnt loads..

I hit 4750 4800 loaded down. best speed is wide open and trim down till I'm at 4550-4580
[youtube]https://www.youtube.com/watch?v=NwFobufM0Uc[/youtube]
https://www.youtube.com/watch?v=NwFobufM0Uc