[LS1] Harrop HTV2300 with Glilmer 1.14:1

[Ginger Beer]

I've been looking at getting a bit more whine from my HTV2300 on my LS1 in my VX SS

I'm happy with the power it currently makes, and I assume that the 1.14: 1 gilmer rear will only make 1 or 2 psi more, which will get some dyno time to ensure that all is well in the AF world

Anyone fitted the 1.14:1 rear drive?

Is it much louder?

What gain in psi did you see?

Cheers

 

[07GTS]

u can defiantly hear it but not sure what its like without it as i got mine already on there from new, mine with camshaft made 13-14psi with stock front pulleys 80mm i think it is

 

[Sandman]

Is E85 an option for you?

 

[Ginger Beer]

u can defiantly hear it but not sure what its like without it as i got mine already on there from new, mine with camshaft made 13-14psi with stock front pulleys 80mm i think it is

Wow, my 85mm pulley on my htv2300 LS1 is running about 7psi

Cam is 223 228 114

I was under the impression that dropping 5mm on the nose gave about another 2 psi????

My "rough" calcs has the 1.14:1 at about a 25% increase of rotor speed of the 1:1

That gave me a possibility incorrect guestimation of 7 x 1.25 = 8.75psi say 9 psi

My math my well be well flawed as that would have a 80mm pulley with the 1.14:1 rear at about 11psi

My assumptions in relating the ratio to psi increase may be way off, there's no way I'm confident that my stock bottom end would be happy with 13-14 psi, hell, I don't want mine pushing any more than 10 psi

How much power are you making with 13-14 psi?

At 7 psi I'm around 315kwatw/950nm with the 2800rpm converter unlocked and built and 4l60e slush box, so about a guestimated 380kw at the motor, using a guestimated 20% drivetrain loss

I'm thinking I need to ring Harrop as I don't want to over boost or overspeed the thing, they are rated to 18000rpm @7k rpm, I'm currently at 16388, or so says the Harrop PDF

If I add 25% to 16388 x 1.25 = almost 20500 rpm......which won't make the thing happy at 7000rpm, although my highest shift point is at 6300 rpm, LOL, and with more poor rough calcs, has the rotors spinning at around 18500 rpm at 6300rpm, which is on the fast side, but possibly do-able

Arrggg, I hate trying to play math, I may need to ring Harrop tomorrow and see what they say

As long as I'm under 450kw/600hp at the motor I am quietly confident that, with a nice fat tune, the stock bottom end and built transmission will last, well, for a little while at least

And now, my brain hurts

 

[Ginger Beer]

Is E85 an option for you?

Nope, dedicated 98 ron

Plus I'm really after whine, not necessarily power

As for E85, nothing really local to me, and as I use the car as a poor weather daily (if it's sunny I'm on the bike), and as weekend long distance cruiser even going flex fuel is more trouble and cost than what it's worth

 

[07GTS]

Wow, my 85mm pulley on my htv2300 LS1 is running about 7psi

Cam is 223 228 114

I was under the impression that dropping 5mm on the nose gave about another 2 psi????

My "rough" calcs has the 1.14:1 at about a 25% increase of rotor speed of the 1:1

That gave me a possibility incorrect guestimation of 7 x 1.25 = 8.75psi say 9 psi

My math my well be well flawed as that would have a 80mm pulley with the 1.14:1 rear at about 11psi

My assumptions in relating the ratio to psi increase may be way off, there's no way I'm confident that my stock bottom end would be happy with 13-14 psi, hell, I don't want mine pushing any more than 10 psi

How much power are you making with 13-14 psi?

At 7 psi I'm around 315kwatw/950nm with the 2800rpm converter unlocked and built and 4l60e slush box, so about a guestimated 380kw at the motor, using a guestimated 20% drivetrain loss

I'm thinking I need to ring Harrop as I don't want to over boost or overspeed the thing, they are rated to 18000rpm @7k rpm, I'm currently at 16388, or so says the Harrop PDF

If I add 25% to 16388 x 1.25 = almost 20500 rpm......which won't make the thing happy at 7000rpm, although my highest shift point is at 6300 rpm, LOL, and with more poor rough calcs, has the rotors spinning at around 18500 rpm at 6300rpm, which is on the fast side, but possibly do-able

Arrggg, I hate trying to play math, I may need to ring Harrop tomorrow and see what they say

As long as I'm under 450kw/600hp at the motor I am quietly confident that, with a nice fat tune, the stock bottom end and built transmission will last, well, for a little while at least

And now, my brain hurts

mine maxed out at 6700rpm which was 18400rpm rotor speed so just over max efficiency, think it was 2.75 rotor to crank ratio, i was on stock LS2 bottom end and e85 cam was vcm6 233 233 114 this is mine a few years back before i started the rebuild the second run was the last time i was on the dyno which i pushed it a little further after then but never got to see what it made, u can also hear the whine it makes, when i took the stock bottom end apart it looked quite good bearing wise was expecting more wear, the 10-12psi should be fine on stock bottom end

 

[shane_3800]

Wow, my 85mm pulley on my htv2300 LS1 is running about 7psi

Cam is 223 228 114

I was under the impression that dropping 5mm on the nose gave about another 2 psi????

My "rough" calcs has the 1.14:1 at about a 25% increase of rotor speed of the 1:1

That gave me a possibility incorrect guestimation of 7 x 1.25 = 8.75psi say 9 psi

My math my well be well flawed as that would have a 80mm pulley with the 1.14:1 rear at about 11psi

My assumptions in relating the ratio to psi increase may be way off, there's no way I'm confident that my stock bottom end would be happy with 13-14 psi, hell, I don't want mine pushing any more than 10 psi

How much power are you making with 13-14 psi?

At 7 psi I'm around 315kwatw/950nm with the 2800rpm converter unlocked and built and 4l60e slush box, so about a guestimated 380kw at the motor, using a guestimated 20% drivetrain loss

I'm thinking I need to ring Harrop as I don't want to over boost or overspeed the thing, they are rated to 18000rpm @7k rpm, I'm currently at 16388, or so says the Harrop PDF

If I add 25% to 16388 x 1.25 = almost 20500 rpm......which won't make the thing happy at 7000rpm, although my highest shift point is at 6300 rpm, LOL, and with more poor rough calcs, has the rotors spinning at around 18500 rpm at 6300rpm, which is on the fast side, but possibly do-able

Arrggg, I hate trying to play math, I may need to ring Harrop tomorrow and see what they say

As long as I'm under 450kw/600hp at the motor I am quietly confident that, with a nice fat tune, the stock bottom end and built transmission will last, well, for a little while at least

And now, my brain hurts

The stock bottom end is stronger than you give it credit for.

Look up "Richard Holdner big bang engine"

 

[Ginger Beer]

The stock bottom end is stronger than you give it credit for.

Look up "Richard Holdner big bang engine"

I like to have a nice fudge factor in my builds, especially when boosted, typically around 20-30%

The weak link in my engine is the rods, as I make fairly high torque at a relatively low rpm (950nm @ around 3k rpm), it’s them that would let go

The old LS1 blocks cost a alot of coin to replace now, because "Straya"

 

[shane_3800]

I like to have a nice fudge factor in my builds, especially when boosted, typically around 20-30%

The weak link in my engine is the rods, as I make fairly high torque at a relatively low rpm (950nm @ around 3k rpm), it’s them that would let go

The old LS1 blocks cost a alot of coin to replace now, because "Straya"

I see what you're saying but you don't have to be at WOT below 3k.

 

[Ginger Beer]

I see what you're saying but you don't have to be at WOT below 3k.

I do when I launch it