My build for 2018
02-12-2018, 03:24 PM
#1
Safety Car
Thread Starter
My build for 2018
I'm getting close to start putting things back together. In November, I pulled my factory shortblock and sold it and worked with HPR to build something that would handle more abuse. I've also had an ongoing battle with finding the right clutch, so I sold my RXT at the same time. The goal is to build an ~850 rwhp street car on E85 and meth with the possibility of swapping the head unit down the road to shoot for 1k+.
Engine
Induction
Exhaust
Fuel system (will be upgraded after engine break in)
Drivetrain
My shortblock should arrive this week and I'll start putting things back together. I expect it take a few weekends before I'm ready to stuff the engine back in.
Engine
- Horsepower Research (HPR) 427 (Darton sleeved 5.3L, Dart CCW crank, K1 rods, Wiseco -8cc pistons, 10.9:1 CR)
- Trickflow 260 Cylinder heads (stock hardware, only resurfaced to 69 cc)
- Cam Motion custom camshaft (222/236 .610"/.603" on 118 LSA)
- Johnson 2110 lifters
- CHE bushings (had BTR trunnions and looked fine after 10k miles of use)
Induction
- A&A V3 Ti-Trim kit with 4.00" pulley (51,000 rpm)
- A&A Secondary drive with 8" IW balancer
Exhaust
- Kooks 2" (up from 1 7/8")
- ZR1 mufflers
Fuel system (will be upgraded after engine break in)
- Injector Dynamics 1050x
- BAP
- Alky Control single nozzle
Drivetrain
- Mantic Triple Cerametallic
- RPM Level 6 transmission
- MGW
- Latest design OEM master
My shortblock should arrive this week and I'll start putting things back together. I expect it take a few weekends before I'm ready to stuff the engine back in.
Last edited by Tech; 02-13-2018 at 02:11 PM.
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HP RESEARCH (02-15-2018)
02-12-2018, 05:58 PM
#4
Safety Car
Thread Starter
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jayyyw (02-12-2018)
02-12-2018, 06:50 PM
#6
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Thread Starter
02-12-2018, 07:09 PM
#7
Drifting
I noticed that. I’m spinning mine slightly harder than you with a stock size balancer and 3.47 blower pulley. Should make for a fun ride, especially with the higher compression and e85.
02-13-2018, 08:00 AM
#8
Race Director
Member Since: May 2004
Location: Raleigh, NC
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St. Jude Donor '15
Sub’d for pics
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HP RESEARCH (02-15-2018)
02-14-2018, 11:34 AM
#10
Very nice! That thing is going to make some serious power.
Just a couple of things that I would change if it were my build, though:
1. I would go with a bigger cam - something like 235/245 and a 118-120 LSA. That would still be a relatively mild cam for a 427 cid.
2. I would do an ECS or A&A external fuel system rather than a BAP. That’s just too nice of a build to not spend the money on a fuel system, in my humble opinion. You can always add that later though.
For a motor that size on boost, it would also be worth looking at the new ARH stepped-primary race headers with 3.5” collectors too, although they are expensive.
Just a couple of things that I would change if it were my build, though:
1. I would go with a bigger cam - something like 235/245 and a 118-120 LSA. That would still be a relatively mild cam for a 427 cid.
2. I would do an ECS or A&A external fuel system rather than a BAP. That’s just too nice of a build to not spend the money on a fuel system, in my humble opinion. You can always add that later though.
For a motor that size on boost, it would also be worth looking at the new ARH stepped-primary race headers with 3.5” collectors too, although they are expensive.
02-14-2018, 12:25 PM
#11
Safety Car
Thread Starter
Very nice! That thing is going to make some serious power.
Just a couple of things that I would change if it were my build, though:
1. I would go with a bigger cam - something like 235/245 and a 118-120 LSA. That would still be a relatively mild cam for a 427 cid.
2. I would do an ECS or A&A external fuel system rather than a BAP. That’s just too nice of a build to not spend the money on a fuel system, in my humble opinion. You can always add that later though.
For a motor that size on boost, it would also be worth looking at the new ARH stepped-primary race headers with 3.5” collectors too, although they are expensive.
Just a couple of things that I would change if it were my build, though:
1. I would go with a bigger cam - something like 235/245 and a 118-120 LSA. That would still be a relatively mild cam for a 427 cid.
2. I would do an ECS or A&A external fuel system rather than a BAP. That’s just too nice of a build to not spend the money on a fuel system, in my humble opinion. You can always add that later though.
For a motor that size on boost, it would also be worth looking at the new ARH stepped-primary race headers with 3.5” collectors too, although they are expensive.
I already have the BAP. As it says, it's only there to break in the engine. It will barely make any boost during that timeframe. A Fore system will replace it with ID1300X injectors.
02-15-2018, 01:18 PM
#12
The cam was custom spec'd by Cam Motion for my needs. I'm very picky about the drivability nuances of cams. If it leaves 20 rwhp on the table, I'm fine with that. I can just add more boost or spray. I'm not looking to set any dyno or land speed records.
I already have the BAP. As it says, it's only there to break in the engine. It will barely make any boost during that timeframe. A Fore system will replace it with ID1300X injectors.
I already have the BAP. As it says, it's only there to break in the engine. It will barely make any boost during that timeframe. A Fore system will replace it with ID1300X injectors.
Do you already have the T-Trim? Just wondering why not start out with a Ysi since you seem to be starting off with the T-Trim maxed out. Cool build!
I've had some clutch woes myself. Not a fan of this Ram twin disc. It works, but it's stiff.
02-15-2018, 01:25 PM
#13
Safety Car
Thread Starter
There we go! My thoughts exactly.
Do you already have the T-Trim? Just wondering why not start out with a Ysi since you seem to be starting off with the T-Trim maxed out. Cool build!
I've had some clutch woes myself. Not a fan of this Ram twin disc. It works, but it's stiff.
Do you already have the T-Trim? Just wondering why not start out with a Ysi since you seem to be starting off with the T-Trim maxed out. Cool build!
I've had some clutch woes myself. Not a fan of this Ram twin disc. It works, but it's stiff.
02-15-2018, 04:18 PM
#15
Safety Car
Thread Starter
Shortblock arrived. I'm going to leave it in the bag until the heads are ready, which should be sometime this weekend if my shims arrive today.
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HP RESEARCH (02-15-2018)
02-15-2018, 04:44 PM
#16
Former Vendor
Can't wait to see the results! 
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Tech (02-15-2018)
02-15-2018, 10:53 PM
#17
Le Mans Master
Tech, I am a long-time friend of Erik Koenig at HPR. Now I live up here near the Loo. I would love to see your car in action once it's up and running. Should be very impressive!
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HP RESEARCH (02-16-2018)
02-16-2018, 12:40 PM
#19
Safety Car
Thread Starter
Shims showed up today. I have a number of springs in between a 0.15" and 0.30" shim. Should I go for the lower or the higher installed height in those scenarios?
I'm using dual springs made by PAC for TFS with part number TFS-16306-16
150 lb/in @ 1.800"
420 lb/in @ 1.200"
1.100" coil bind
I'm using dual springs made by PAC for TFS with part number TFS-16306-16
150 lb/in @ 1.800"
420 lb/in @ 1.200"
1.100" coil bind
02-16-2018, 01:00 PM
#20
With that heavier 118 gram intake valve I’d shim the springs to be .040-.060” from coil bind so you can get some more seat pressure. Same thing for the exhaust.
Last edited by Petraszewsky; 02-16-2018 at 01:02 PM.