I'm building another solid roller 427 SBC
Drifting
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From: Tri-Cities TN
Safety Car
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From: Lompoc, CA. Santa Barbara County
Hey maybe this summer I will drive my Vette up in MN! fight the bugs the whole way
My poor old Vette has nearly 170,000 miles on it ........... across the US a couple of times and 1200+ mile trips on a weekend.
I just have fun on old hot rodded motors that run fine and are are faster than 99% of the cars on the road. Very few cars drive around with sub 5 pounds per HP
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My poor old Vette has nearly 170,000 miles on it ........... across the US a couple of times and 1200+ mile trips on a weekend.
I just have fun on old hot rodded motors that run fine and are are faster than 99% of the cars on the road. Very few cars drive around with sub 5 pounds per HP
[/URL]Bee Jay
Thread Starter
Team Owner
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I have done the RWHP dyno tuning at the sea level shops before a season of road racing because all the California tacks are near sea level. Infineon, Laguna Seca, and Thunderhill. I have not done motor dyno time where i live at 4700 feet.
Quote: Originally Posted by gkull
The peak is going to be @ 7000 and my last few motors were still making substantial power at the self imposed rev limited 7500.
Unless you go to some AllPro 23 degree stuff there isn't a std valve angle head to support that much CID to a peak of 7500 rpm out there.
I keep saying 7000 rpm peak.
I haven't heard of a date yet.
Quote: Originally Posted by gkull
The peak is going to be @ 7000 and my last few motors were still making substantial power at the self imposed rev limited 7500.
Unless you go to some AllPro 23 degree stuff there isn't a std valve angle head to support that much CID to a peak of 7500 rpm out there.
I keep saying 7000 rpm peak.
I haven't heard of a date yet.
Safety Car
Joined: Nov 2005
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From: Lompoc, CA. Santa Barbara County
Race Director
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From: California
Drifting
Joined: Jun 2008
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I have done the RWHP dyno tuning at the sea level shops before a season of road racing because all the California tacks are near sea level. Infineon, Laguna Seca, and Thunderhill. I have not done motor dyno time where i live at 4700 feet.
Quote: Originally Posted by gkull
The peak is going to be @ 7000 and my last few motors were still making substantial power at the self imposed rev limited 7500.
Unless you go to some AllPro 23 degree stuff there isn't a std valve angle head to support that much CID to a peak of 7500 rpm out there.
I keep saying 7000 rpm peak.
I haven't heard of a date yet.
Quote: Originally Posted by gkull
The peak is going to be @ 7000 and my last few motors were still making substantial power at the self imposed rev limited 7500.
Unless you go to some AllPro 23 degree stuff there isn't a std valve angle head to support that much CID to a peak of 7500 rpm out there.
I keep saying 7000 rpm peak.
I haven't heard of a date yet.
7000 rpm peak hp in a 427 CID engine with a 252@.050 cam? Even with plenty of head CSA that cam sounds small.
Last edited by Neil B; Feb 4, 2015 at 08:14 AM.
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From: California
Burning Brakes
Joined: Sep 2011
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The ultrastreet 434/700 (4" x 4.155"), with afr 245s makes 700hp at 6600rpm and 595tq at 5400rpm using a solid roller cam. Wouldn't a slightly shorter stroke get a build to 7000rpm? A 4.185" x 3.875" may not add 400rpm, but is should add a little.
Last edited by uxojerry; Feb 4, 2015 at 07:24 PM.
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Drifting
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What are the cam specs on that motor?
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From: anchorage ak
Burning Brakes
Joined: Sep 2011
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I have a shaffiroff 427 and the company was easy to deal with. Their complete afr 245 top end kit comes with matched pistons. Im sure if the parts were purchased through them, they would provide their cam specs. Their cam is going to be conservative if they are offering a 24 month warranty on the 434 crate motor.
Safety Car
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From: anchorage ak
I have a shaffiroff 427 and the company was easy to deal with. Their complete afr 245 top end kit comes with matched pistons. Im sure if the parts were purchased through them, they would provide their cam specs. Their cam is going to be conservative if they are offering a 24 month warranty on the 434 crate motor.
Burning Brakes
Joined: Oct 2007
Posts: 816
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I have looked at the Shaffiroff crate engines and I did like the 427 and the 434 pump gas models. They make huge power and being on 93oct is a plus.
However the price tag that goes with it is a bit much for me to swallow. I then looked at their short block which $4,700 I believe. I am curious if you can by the top end kit they use for their full engine and save a few buck?
Just curious because I would eventually like to have a 427 or 434 small block.
What is an engine like this costing once complete if you build it yourself?
However the price tag that goes with it is a bit much for me to swallow. I then looked at their short block which $4,700 I believe. I am curious if you can by the top end kit they use for their full engine and save a few buck?
Just curious because I would eventually like to have a 427 or 434 small block.
What is an engine like this costing once complete if you build it yourself?
Race Director
Joined: May 2003
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From: California
When I built my 427, I looked into an aluminum block as well... the 2 major problems were, 1.. the cost as we have all seen for a "good quality USA block" , and 2 I found that the Aluminum block is NOT as strong as a steel block and under very high HP use over and over again they twist or torque and some have issues... so for the money, and the longevity of the engine I went steel block. This in turn let me also invest more money into my build... I spent almost $15,000 in just parts, and an aluminum block would have put my upward of around $20,000... I just did not feel the investment was worth the return for 50lbs. Heck, spend $300 for a battery like I did, theres 40lbs right there... and a heck of a lot cheeper:-)
Burning Brakes
Joined: Oct 2007
Posts: 816
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When I built my 427, I looked into an aluminum block as well... the 2 major problems were, 1.. the cost as we have all seen for a "good quality USA block" , and 2 I found that the Aluminum block is NOT as strong as a steel block and under very high HP use over and over again they twist or torque and some have issues... so for the money, and the longevity of the engine I went steel block. This in turn let me also invest more money into my build... I spent almost $15,000 in just parts, and an aluminum block would have put my upward of around $20,000... I just did not feel the investment was worth the return for 50lbs. Heck, spend $300 for a battery like I did, theres 40lbs right there... and a heck of a lot cheeper:-)
Shaffiroff offers a 427 crate engine that makes 525hp for just under $10k but it does not include a carburetor. They also offer a 434 pump gas engine that makes 765hp! for $14,500.
I have always built my own engines and have never ventured out to a crate. However some of these companies got me thinking with what they offer and the power they make vs specing and building your own and hoping it makes the same power.
Race Director
Joined: May 2003
Posts: 10,956
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From: California
Did you build your engine from a bare block? did you do all the work or did someone assemble it fore you?
Shaffiroff offers a 427 crate engine that makes 525hp for just under $10k but it does not include a carburetor. They also offer a 434 pump gas engine that makes 765hp! for $14,500.
I have always built my own engines and have never ventured out to a crate. However some of these companies got me thinking with what they offer and the power they make vs specing and building your own and hoping it makes the same power.
Shaffiroff offers a 427 crate engine that makes 525hp for just under $10k but it does not include a carburetor. They also offer a 434 pump gas engine that makes 765hp! for $14,500.
I have always built my own engines and have never ventured out to a crate. However some of these companies got me thinking with what they offer and the power they make vs specing and building your own and hoping it makes the same power.
My engine makes 650hp, I run a callies Dragon slayer crank, H-beams and I could go on... the parts in my engine are FAR superior to the parts used in the build you describe... my power band from peek tq to peek hp spans from around 2500K to 6500K rpm. I would go so far as to say, 80% of the parts I used are better than the parts they call out, and all are made in the USA:-) my bottom end is good for somewhere around 1500hp... the above build is not. The pricing I gave includes my EFI, twin disk clutches and well, everything from the clutch to the water pump, and from the EFI to the oil pan..
Cheap buys twice.
Last edited by pauldana; Feb 9, 2015 at 04:55 PM.