500efis with XR
 

On a 10,000lb cig TIGER that runs 73mph, I want to go 85. What do I do?

Wild

Re: 500efis with XR
 

Vortech Prochargers.

Re: 500efis with XR
 

How much, dang LS you are everywhere.

If i bump them to 700-750hp will that kill the XR drives

Wild

Re: 500efis with XR
 

or whipples....

750 horse in a big cig...... ask GLH

Re: 500efis with XR
 

I dont think you need that much power to pick up 13 mph. Look to get 600-650/ per motor and youll see 80-85. I would stroke them to 540s. that will give you a mild 600-650hp at low comp around 5500rpms. How many hours on the 500s? You may want to tear them down anyway before you put blowers on. So, its your choice.

Re: 500efis with XR
 

Bruce, you are talking french to me, sorry I am no mechanic,

Stoke them???? what does that mean
250 hrs
What type of blowers

Thanks

Re: 500efis with XR
 

There is a 96' TG out there w/American Flag graphics that has 500EFI and what I think is a whipple. Around 625hp? That would do it and you wouldn't kill your drives.

LS JR.

Re: 500efis with XR
 

Wild,

01, T/S Tiger, 575's runs 84 in fresh water, 4 guys and half fuel.

Jamie

Re: 500efis with XR
 

What is the price difference between votecs and whipples, what other pros and cons about each. And who do I contact about each.

Thanks

Randy Wild

Re: 500efis with XR
 

Sorry wild. my bad

If you change your crank rod and pistons, to increase the stroke. You will increase your cubic inch from 502 to 540. That alone will give you 600 hp or more. You'll probably need to change your cam and do some mild head work as well along with EFI adjustment.

the cost for this work will probably run 5,000 - 7,000 per side

I dont know too much about blowers, but I see many guys going with whipple chargers or prochargers on the 500 efis. With 250 hrs on your engines, it would be prudent to check them out before going the blower route. With that in mind, your lookin at 6,000-8,000 per side. Either way, you will get 650 reliable HP, 85 mph and your XRs will live.

Just My opinion. Im no professional.