11:1 CR Race/Street Engine build
As many of you may know, I am putting together a race/street engine for Dan Nall/ Shotgunslade's SVX.
Particulars: 11:1 Supertech Pistons from LAN Eagle H-beam rods ACL Bearings Polished crank Web Cams weld/grind w/ custom profile specifically for this engine Brian Crower coated SS intake&exhaust valves Brian Crower upgraded springs w/ titanium retainers RallyBob ported cylinder heads Equal length headers Tomyx intake 200mm HKS Mega Flow Element Hydra Nemesis w/ custom tune 740cc Injectors (poss. running race fuel/ E85 for track days) Walbro 255lph fuel pump Cometic HG's ARP head studs & fasteners Remote mount electric water pump w/ aux cooling paths to cyl heads to try and repair the overheating issues tracked EG33's have had in the past Shotblock has already had all clearances set by my local speedshop and was fully assembled in-shop at AWD. WE are aiming for a power goal of 260AWHP w/ matching torque. This is for two reasons, 1. It needs to pass NJ emissions 2. It needs to be able to be driven on the street effortlessly. Granted we could create a huge cam like Rallybob and the EG33RS guys did but we needed something a little more subtle. This is not a cheap build and the budget Dan has allotted has allowed us to use very high quality parts and address many issues others have experienced in the past. My expectations for this engine are much higher than the goals stated earlier. I fully expect to be flirting w/ 300AWHP/tq but time will tell. More once I know more from Web and Rallybob on the heads Tom |
Re: 11:1 CR Race/Street Engine build
:eek: WOW!!! 260 AWHP sounds awesome expecially for N/A. Good luck and I will be sure to follow closely:cool:
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Re: 11:1 CR Race/Street Engine build
That just sounds like a very nice non-turbo engine. I can only imagine what it would be like to drive, especially with a STI/Spec B 6MT gearbox and rear diff.
Looking forward to hearing about the driving impressions... :D |
Re: 11:1 CR Race/Street Engine build
Sounds good Tom! I won't bother asking about the price until the build is completely done. What is the expected timeline for all of this? Also, will you be starting off with a baseline dyno number to be able to reference the difference in before and after modifications?
The whp looks neat but it may be more valuable to some to know what the difference in hp/torque than can expect since people will get varying degrees of gains/losses. At any rate, good luck! |
Re: 11:1 CR Race/Street Engine build
Nice project, costly too but worth it in my opinion.
What brand are you going through for the electric pumps? Which ones? PS: Tom, pm me I might have something for you on concerning the heads. |
Re: 11:1 CR Race/Street Engine build
I am waiting to hear back from RallyBob on what pump they have chosen for their engine. They seem to have had some good luck with their coolant system in helping the overheating.
Total price will be disclosed at the discretion of the owner. Danny, what did you have in mind, you can feel free to post it here Tom |
Re: 11:1 CR Race/Street Engine build
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Tom |
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- SIVN-1012/2 Subaru 2.0lts/WRX Intake valve 36.5x5.96x103.85mm/SS/Black Nitrided/backcut./ +0.5mm head diam./ Length and groove is 0.5mm lower than stock. - SEVN-1012/2 Subaru 2.0lts/WRX Exhaust valve 32.5x5.96x104.20mm/SS/Black Nitrided/ +0.5mm head diam./ Length and groove is 0.5mm lower than stock. - SPRK-TS1015/SU3 Dual valve spring 27.50/20/15.20mm, CB:20.70mm/ 64lbs@36mm / 204 lbs@11.5mm lift/ Chrome Silicon/ Max recommended lift 13.3mm comes with retainers and seat locators. - CF-33/3.0 Cam Follower, solid, 33x26x3.0mm. - 33mm BMW Buckets. The valvetrain configuration is based on a 244° @ .050" duration (stock was 196* @ 0.050", that is nearly an additional of 50* duration), plus a massive valve lift increase (.444"/11.27 mm intake, .460"/11.68 mm exhaust lift). Now I already spoke with the machinist who performed the work on the XXtuning heads, sent him all the info that I have for him to cross reference them with his notes. I am expecting his reply next week. For the camshafts, I am negotiating with another manufacturer, much cheaper than Web. |
Re: 11:1 CR Race/Street Engine build
While that may be good, we are confined to a stock diamter valve due to the piston selection. I originally wanted to use +1mm valves but we withdrew from that idea. I have gutted a set of SVX buckets and I will be using modified 2.5rs shims. I just need to know the shimless clearances before I can order the right sized shims.
Tom |
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Re: 11:1 CR Race/Street Engine build
I'm not claiming to be an expert here, but I never understood why a lot of you guys run such absolutely massive injectors on these engines. Do you really need 700+ cc of fuel for 260 wheel power?
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Tom |
Re: 11:1 CR Race/Street Engine build
Tom what rpm are you looking at, to make peak torque?
Harvey. |
Re: 11:1 CR Race/Street Engine build
Our peak torque is not going to be too much off of the stock curve. The engine is not going to be built to spin insane RPMs rather have a very very meaty torque curve. We have set our redline at 7500 and I hope to see a peak around 6500-7000 rpm
Tom |
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