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My Boostrd 427 Build

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Old 02-11-2018, 01:01 PM
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427V8BB
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Default My Boostrd 427 Build

My #7 piston broke on my ls7 so I’m going with a 427 ERL LSA block 6 bolt 1/2 inch stud block:

Goals: able to get 1000whp on e85 trying to stay on a budget

What rotating assembly: looking at eagle crank and rods with CP pistons

What fuel injectors: ?? Need help

What fuel pump: needs to be e85 capable??? Need help

Cam: boosted cam?

Oiling: stock ls7 oil pump?? Good enough? Dry sump

what clutch: ???

what blower: wanting a top deck is it better to go centri?

other: I’m not worried about the drive train as of now, looking to see what I can get on pump 91 will want flex fuel I’ll be having two tunes I guess.




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Old 02-11-2018, 03:24 PM
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Similar build to mine, ERL 4 bolt 427. I use a YSI with meth and N2O. Mine has been to together for about 5 year with several Texas Mile runs over 200mph. Around 950-1000 with the blower and more on juice. Made my own fuel system to support the power.

Good luck with you build, What are your plans for the car?
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Old 02-11-2018, 03:35 PM
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Originally Posted by gotjuice? View Post
Similar build to mine, ERL 4 bolt 427. I use a YSI with meth and N2O. Mine has been to together for about 5 year with several Texas Mile runs over 200mph. Around 950-1000 with the blower and more on juice. Made my own fuel system to support the power.

Good luck with you build, What are your plans for the car?

mostly street driven it’s my DD but the occasional 1/4 mile full mile monthly events not trying to break records mostly just want the power to beat anycar pulling up on me on the way to work LOL and a 9 sec car


made your own fuel system???

and is that power on e85?? Can I hit 800whp on 91?

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Old 02-11-2018, 04:33 PM
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With 91 and meth, you can hit 800whp with the right setup. I would build the fuel system to support your 1000whp goal by leaving room to grow. Most go with the Fore or ECS e85 capable fuel systems and you’ll probably want to go with at least ID 1300s for injectors.

I would also get a custom cam spec’d for your build to make good power and retain good driveability. For clutch, I would do a Mantic Triple. For the blower, I would go with either a YSI/2200R or F1A-94.
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Old 02-11-2018, 04:37 PM
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It will be much easier to make 1000 with a centi blower.

You are also looking at adding a lot of stroke to have a 427 when its not needed. The extra stroke is not going to make any real power. Stick with a 4" stroke imo.

The entry level forge cranks like compstar and eagle don't do well with blowers and big power. Do some research, especially with compstar and you will see people have had them flex. It happened to me. Look into at least a dragon slayer or better crank. I went with the dart center counter weighted crank.

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Old 02-11-2018, 04:41 PM
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800 with YSI should be no problem. I use the factory pump with a switched Magnafuel external pump. I have not used E85 on this setup.
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Old 02-11-2018, 05:12 PM
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Originally Posted by silver408z View Post
It will be much easier to make 1000 with a centi blower.

You are also looking at adding a lot of stroke to have a 427 when its not needed. The extra stroke is not going to make any real power. Stick with a 4" stroke imo.

The entry level forge cranks like compstar and eagle don't do well with blowers and big power. Do some research, especially with compstar and you will see people have had them flex. It happened to me. Look into at least a dragon slayer or better crank. I went with the dart center counter weighted crank.

its bored out 4.125
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Old 02-11-2018, 05:13 PM
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Originally Posted by Patriot Six View Post
With 91 and meth, you can hit 800whp with the right setup. I would build the fuel system to support your 1000whp goal by leaving room to grow. Most go with the Fore or ECS e85 capable fuel systems and you値l probably want to go with at least ID 1300s for injectors.

I would also get a custom cam spec壇 for your build to make good power and retain good driveability. For clutch, I would do a Mantic Triple. For the blower, I would go with either a YSI/2200R or F1A-94.
clutch I値l go for I値l get a custom cam by my tuner, but looks like
i have to cut back on my budget as things came up. Can I slap on ls9 heads with a lsa or ls9 blower? What would
i need to change accessory wise?
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Old 02-11-2018, 05:14 PM
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Originally Posted by silver408z View Post
It will be much easier to make 1000 with a centi blower.

You are also looking at adding a lot of stroke to have a 427 when its not needed. The extra stroke is not going to make any real power. Stick with a 4" stroke imo.

The entry level forge cranks like compstar and eagle don't do well with blowers and big power. Do some research, especially with compstar and you will see people have had them flex. It happened to me. Look into at least a dragon slayer or better crank. I went with the dart center counter weighted crank.
what rod/piston do you recommend
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Old 02-11-2018, 05:31 PM
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Originally Posted by 427V8BB View Post


clutch I値l go for I値l get a custom cam by my tuner, but looks like
i have to cut back on my budget as things came up. Can I slap on ls9 heads with a lsa or ls9 blower? What would
i need to change accessory wise?
I知 not familiar with doing a LSA/9 conversion, but in addition to the blower kit, intercooler, fuel rails, etc, you might have to relocate some pullies. I would use a centri for your power goals because the LSA/9 blower will probably run out of steam on a 427.
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Old 02-11-2018, 05:33 PM
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LS9 blower as the LSA 1.9 is too small for the 427.
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Old 02-11-2018, 05:48 PM
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Originally Posted by gotjuice? View Post
LS9 blower as the LSA 1.9 is too small for the 427.

cant seem to find a ls9 used for sale at all might have to go lsa can I achieve 800whp on either of these blowers I rather do this and upgrade to something for 1000 down the road
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Old 02-11-2018, 06:00 PM
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Will be difficult to do LSA blower due to extended snout. It can be done, just more difficult. Just do a used centri kit for the time being.
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Old 02-11-2018, 06:00 PM
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I think forum member Tech was looking to possibly sell his A&A V3-Ti trim. I’m making over 800whp on an LS7 with the same blower.
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Old 02-11-2018, 06:01 PM
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Originally Posted by gotjuice? View Post
Will be difficult to do LSA blower due to extended snout. It can be done, just more difficult. Just do a used centri kit for the time being.

prob on a good idea how good of a deal can you score on a used centri kit and where Facebook and forums I see a Edelbrock for sale for 4K obo for a ls7 on eBay
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Old 02-11-2018, 06:02 PM
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Originally Posted by Patriot Six View Post
I think forum member Tech was looking to possibly sell his A&A V3-Ti trim. I知 making over 800whp on an LS7 with the same blower.



pump gas?
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Old 02-11-2018, 06:22 PM
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93+meth
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Old 02-11-2018, 08:14 PM
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Originally Posted by 427V8BB View Post


what rod/piston do you recommend
My current build is a 427 also. Its a dart SHP block, dart billet centered countered weight crank, wiseco boostline rods and wiseco pistons. The crank priced really well for what it is. Cheaper than the billet callies crank and only slightly more expensive than a callies dragon slayer. The wiseco rods are a new design. They are made to hold big power and priced well. Wiseco pistons to top it off. They are known to make good pistons.
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Old 02-11-2018, 08:22 PM
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Originally Posted by silver408z View Post
My current build is a 427 also. Its a dart SHP block, dart billet centered countered weight crank, wiseco boostline rods and wiseco pistons. The crank priced really well for what it is. Cheaper than the billet callies crank and only slightly more expensive than a callies dragon slayer. The wiseco rods are a new design. They are made to hold big power and priced well. Wiseco pistons to top it off. They are known to make good pistons.

this rotating assembly is gonna kill me I want something that can hold 1000whp max 800whp on boost and 200 on the juice really not wanting to spend near 2k on just a crank I heard OEM ls7 cranks are good for 1400hp
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Old 02-11-2018, 09:41 PM
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Originally Posted by 427V8BB View Post



this rotating assembly is gonna kill me I want something that can hold 1000whp max 800whp on boost and 200 on the juice really not wanting to spend near 2k on just a crank I heard OEM ls7 cranks are good for 1400hp
I have seen cars make 1000 on grand sport ls3 cranks because they are forged and dry sump. But that is pretty much pushing them to limit. I don't know much about ls7 cranks.

If you haven't already, look through this thread. This is where I bought my engine.

https://www.corvetteforum.com/forums...lock-sale.html

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