Mod Horsepower improvements

[christianUK]

Hello experts,

Instead of just naming them, my insurance wants to know the horsepower impact of the mods as well. I'm wondering if the collective intelligence might be able to give me some ideas of what I should put down.

Assuming base 415 hp (we're talking about the GT). Would you be able to hazard a guess for how much each of these put HP up by?

Velossa Big Mouth:
GT350 CAI:
GT350 87mm Throttle body: 10 Hp (says on the blurb)
GT350 Manifold:
Kooks long tube headers w. green cats:
Borla Touring exhaust catback:
Lund Tune:

I'm doing the induction in bits, hence good to know individual pieces.

Many thanks,

Christian

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[Manders Mustang]

Looking somewhere in the region of 500 Wheel horsies with all of those.

Think Gibbo without headers is around the 470-500 mark with tune, throttle body, manifold, cai etc. Headers will be good for about 30-40 horsies, lund tunes a bit like a catalyst to every mod.

At a guess... If i was to hazard one, like 490-530 horsies. But [MENTION=13598]Gibbo205[/MENTION] will be able to give you a more accurate number.

 

[Nookie]

This sounds like it's gonna be a 'let's see how much we can screw him for' attempt by the insurance company!

 

[christianUK]

Weirdly, they have agreed to them all and set the premium (which I have paid). Now they just want the details afterwards.

 

[GR11M]

How much extra did the insurance company charge, I've got almost exactly those parts, albeit somewhere in transit ?

 

[Kristian87]

Weirdly, they have agreed to them all and set the premium (which I have paid). Now they just want the details afterwards.

That is a weird request on their part. Who are you insured with?

They want a collective number or individual for each item? I would just quote whatever is on the web page descriptions.

Only way to give them an accurate number is to dyno it i guess.

Maybe the person you spoke to is building a race car and is doing their research :lol:

 

[slowhand99]

For simplicity I would say to them "no more than 20%". If you have to correct it once you've been on a dyno (although you'd have to do before and after for the at wheels figure) then fair enough. They'll have a job proving you wrong if you bin it.

Edit - just noticed you said " hello experts"; I shouldn't really have replied

 

[christianUK]

I'm with Adrian Flux. So the insurance is bought with all the mods listed with the underwriter and then I'm sent to fill out an online "modified vehicle report form" with this greater degree of detail. I'll do a couple of screen grabs now and you can see.

The actual policy is with Equity Red Star. To paraphrase, it's pretty much any and all mods for +£200 on the base price, with the exception of nitrous oxide.

 

[christianUK]

Oh actually it gets easier. The rest of the sections don't worry about HP. It's just the same info I originally gave all over again.

 

[Centurion07]

I'm with them and have never seen one of those forms.

Told them over the phone what the mods were and they just added them.

The only thing they wanted to know the BHP increase of was the tune. In fact, they were the only one of 4 big companies that would even cover the tune.

Think my first year was a bit over £700 (started with limited mileage!), then the renewal was over £900 once I added the tune. Robbing fucks.

I hate insurance companies.

 

[christianUK]

Sounds like me. What did you put down for the HP of the tune Centurion?

 

[Gibbo205]

Hello experts,

Instead of just naming them, my insurance wants to know the horsepower impact of the mods as well. I'm wondering if the collective intelligence might be able to give me some ideas of what I should put down.

Assuming base 415 hp (we're talking about the GT). Would you be able to hazard a guess for how much each of these put HP up by?

Velossa Big Mouth:
GT350 CAI:
GT350 87mm Throttle body: 10 Hp (says on the blurb)
GT350 Manifold:
Kooks long tube headers w. green cats:
Borla Touring exhaust catback:
Lund Tune:

I'm doing the induction in bits, hence good to know individual pieces.

Many thanks,

Christian

CAI: Only works with a tune but is worth 10HP
TB: 8-10HP, again only works with tune! (Not as smooth at low RPM)
350 Mani: 20-30HP tuned
Kooks: 30-40HP
Catback: 0-5HP
Lund: 20-30HP

All the above should see you at 520-550HP crank once the tune is properly dialled in based on Vpower99 fuel. If you run regular unleaded it will be around 500-530HP and if you run junk undleaded probably around 500HP.

The fuel makes a huge difference to the power once tuned, simply due to Octane rating, Lund leaves the tune adaptive switched on, so if you chucked in 100 octane race fuel you'd make more power again.

If you want to run vegetable aka E85 you need to request a flex tune, though doubtful for UK owners as E85 is hard to source but is like high Octane or in RON terms around 105 RON for power and has fantastic knock resistance.

The lower the fuel quality the more prone to knock you become. ;)

 

[GR11M]

Isn't that near the limit of the stock fuel injectors ?

 

[Centurion07]

Sounds like me. What did you put down for the HP of the tune Centurion?

Less than 10% IIRC.

Think they only get funny if +20% comes from a tune. No idea why. They're insuring a power increase, none of their business where it comes from. Not going to change how bad the damage is in the event of a crash.

 

[christianUK]

Cheers guys. That's what I needed

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