180 at idle, 210 driving.
Thread Starter
Launching!
Joined: Feb 2010
Posts: 276
Likes: 1
From: Mid Mo via Lancs. England
Spoke to Texas Speed about the heads etc.
For $1550, I would get the heads surfaced, CNC'd, a custom camshaft and new pushrods. Gaskets and shipping on top of that.
Thoughts?
Normally costs me @$220 to pressure test and surface a pair of heads, then I go through them myself.
$4123 for the ATK 408 LS motor, less a $450 core charge, would get me a whole new motor though.....Decisions decisions.
I could rebuild it myself of course, but then time comes into it, as well as the parts bill to get a little more out of it.
Thoughts??
Martin
For $1550, I would get the heads surfaced, CNC'd, a custom camshaft and new pushrods. Gaskets and shipping on top of that.
Thoughts?
Normally costs me @$220 to pressure test and surface a pair of heads, then I go through them myself.
$4123 for the ATK 408 LS motor, less a $450 core charge, would get me a whole new motor though.....Decisions decisions.
I could rebuild it myself of course, but then time comes into it, as well as the parts bill to get a little more out of it.
Thoughts??
Martin
Thread Starter
Launching!
Joined: Feb 2010
Posts: 276
Likes: 1
From: Mid Mo via Lancs. England
I went for the ATK HP97 motor, cant beat the price and warranty, which I hope never to use.
Everything else as it was before, besides some wiring I extended to run behind the motor instead of up front. While breaking the cam in, 2000-2500rpm's for 30 minutes, the fan cycles on and off wherever I set it at. So looks to be solved at this point. I do think it was the pump though myself.
PRW have been useless to be honest. They claimed that they didnt even have any pulleys and never bothered after that.
I got some slightly larger bolts, drilled and tapped the mounting holes, and refit the pulley after some finnesing.
So far so good.
Here is how it looks now.
Martin
Everything else as it was before, besides some wiring I extended to run behind the motor instead of up front. While breaking the cam in, 2000-2500rpm's for 30 minutes, the fan cycles on and off wherever I set it at. So looks to be solved at this point. I do think it was the pump though myself.
PRW have been useless to be honest. They claimed that they didnt even have any pulleys and never bothered after that.
I got some slightly larger bolts, drilled and tapped the mounting holes, and refit the pulley after some finnesing.
So far so good.
Here is how it looks now.
Martin
Thread Starter
Launching!
Joined: Feb 2010
Posts: 276
Likes: 1
From: Mid Mo via Lancs. England
On paper yes a lot more HP. Not driven it yet, just broke the camshaft in.
For what it costs me to build a stock motor, @$2,000, I couldn't beat the price of the ATK one at $3064 to my door with a warranty.
And thank you!
Martin
For what it costs me to build a stock motor, @$2,000, I couldn't beat the price of the ATK one at $3064 to my door with a warranty.
And thank you!
Martin
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Launching!
Joined: Feb 2010
Posts: 276
Likes: 1
From: Mid Mo via Lancs. England
Thanks!
Put @120 miles on it today.
Knew it was running really rich by the crap idle from cold and the really bad smell of gas at startup in the shop.
During the drive today, CEL came on with running too rich on both banks, LOL.
Going Friday for its tune.
So far the ATK motor is performing excellent.
Put @120 miles on it today.
Knew it was running really rich by the crap idle from cold and the really bad smell of gas at startup in the shop.
During the drive today, CEL came on with running too rich on both banks, LOL.
Going Friday for its tune.
So far the ATK motor is performing excellent.
Thread Starter
Launching!
Joined: Feb 2010
Posts: 276
Likes: 1
From: Mid Mo via Lancs. England
Cheers.
The PRW water pump is far from impressing me, and I have yet to hear a word from the idiots.
Dropped it off at a local tuner, but he couldn't get into the ECM. Maybe something the previous tuner did, as he never mentioned having any issues with it.
Martin
The PRW water pump is far from impressing me, and I have yet to hear a word from the idiots.
Dropped it off at a local tuner, but he couldn't get into the ECM. Maybe something the previous tuner did, as he never mentioned having any issues with it.
Martin
Cheers.
The PRW water pump is far from impressing me, and I have yet to hear a word from the idiots.
Dropped it off at a local tuner, but he couldn't get into the ECM. Maybe something the previous tuner did, as he never mentioned having any issues with it.
Martin
The PRW water pump is far from impressing me, and I have yet to hear a word from the idiots.
Dropped it off at a local tuner, but he couldn't get into the ECM. Maybe something the previous tuner did, as he never mentioned having any issues with it.
Martin
Registered User
Joined: Jun 2018
Posts: 1
Likes: 0
ATK hp97 5.3 Silverado motor I kind of want to ask you a few questions I also got a HP 97atK engine and want to ask you a few questions I've never built LS 5.3 motor another way different than the regular small block 350 it would be greatly appreciated if you could call me whenever you get a chance I just would rather have a speak to somebody that has already done it before so I could give me a call whenever you get a chance my number is 407-307-9835 I'm more than mechanically inclined I built a 70 Chevelle when I was 15 with my dad as a graduation present and this is for my boss and I don't want to screw up rather be safe than sorry
I went for the ATK HP97 motor, cant beat the price and warranty, which I hope never to use.
Everything else as it was before, besides some wiring I extended to run behind the motor instead of up front. While breaking the cam in, 2000-2500rpm's for 30 minutes, the fan cycles on and off wherever I set it at. So looks to be solved at this point. I do think it was the pump though myself.
PRW have been useless to be honest. They claimed that they didnt even have any pulleys and never bothered after that.
I got some slightly larger bolts, drilled and tapped the mounting holes, and refit the pulley after some finnesing.
So far so good.
Here is how it looks now.
Attachment 521792
Martin
Everything else as it was before, besides some wiring I extended to run behind the motor instead of up front. While breaking the cam in, 2000-2500rpm's for 30 minutes, the fan cycles on and off wherever I set it at. So looks to be solved at this point. I do think it was the pump though myself.
PRW have been useless to be honest. They claimed that they didnt even have any pulleys and never bothered after that.
I got some slightly larger bolts, drilled and tapped the mounting holes, and refit the pulley after some finnesing.
So far so good.
Here is how it looks now.
Attachment 521792
Martin