C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Intake for a 427

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Old Apr 5, 2016 | 05:44 PM
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Default Intake for a 427

Hi everyone I just bought a blueprint 427ci crate motor and I was wondering if the TPIS miniram that I had on my 383 would feed the 427 or if I would need to get another intake.

also will 42 lb injectors feed this engine?

here is the engine specs.

http://www.jegs.com/i/Blueprint+Engi...272CT/10002/-1

Thank you for any input you can provide.

Last edited by ShadowC4; Apr 5, 2016 at 05:44 PM.
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Old Apr 5, 2016 | 07:51 PM
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Mini Ram and 42lb injectors will be fine on that combo.
Will
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Old Apr 5, 2016 | 08:30 PM
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Congrats on the crate engine but I'm wondering why a 427 "only" puts out 540 horse at the crank? I'm guessing with the miniram it won't make that torque rating.....maybe hp will bump up? It's more than enough power to get me in trouble but was just curious. For the price, looks like it has some good stuff packed inside it.
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Old Apr 5, 2016 | 11:40 PM
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Originally Posted by 1985 Corvette
Congrats on the crate engine but I'm wondering why a 427 "only" puts out 540 horse at the crank? I'm guessing with the miniram it won't make that torque rating.....maybe hp will bump up? It's more than enough power to get me in trouble but was just curious. For the price, looks like it has some good stuff packed inside it.
I agree it should be making more, but they probably toned it down a bit for the 30 month/ 50k mile warranty which was a big selling point for me.
That, and also having a 427 Corvette.

Since Blueprint dynos it before they ship it, I will put the car on the dyno to see how the miniram affected the power curve.

I guess i'll make do with "only" 540hp
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Old Apr 6, 2016 | 05:37 AM
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would love to see you dyno it and compare
you can use plenty of intake cam and head on a 427
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Old Apr 6, 2016 | 09:05 AM
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The power seems low but the camshaft is very low lift and fairly small duration for such a long stoke SBC. 4" stroke SBC's will eat up cyl seemingly big heads and camshaft.... What seems big for a 350 or 383 really isn't big enough on a 4" stroke engine.

The cam is a trade off for power, driveability and reliability, but that said that 540HP engine would easily run low 11's to high 10's in a halfway decently set up car.

I do not believe the miniram will have any problems at all meeting the advertised HP and TQ numbers. It won't follow the power curves perfectly as they used a Single Plane Intake in testing but the peak numbers will be very close.

Will

Last edited by rklessdriver; Apr 6, 2016 at 09:05 AM.
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Old Apr 6, 2016 | 12:40 PM
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Nice price on tha engine
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Old Apr 6, 2016 | 05:57 PM
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Originally Posted by ShadowC4
I agree it should be making more, but they probably toned it down a bit for the 30 month/ 50k mile warranty which was a big selling point for me.
That, and also having a 427 Corvette.

Since Blueprint dynos it before they ship it, I will put the car on the dyno to see how the miniram affected the power curve.

I guess i'll make do with "only" 540hp
I hear ya. I would be happy with it too....guess I've been spoiled by a few 427 builds I have seen on here but the cost for those adds a bit more to it than the cost of this one. Actually, (sadly) your crate motor is a little cheaper than the 383 I got built so my loss, your gain. LS3 crates about the price of this one, I'd love to have an LS but it is hard to argue with the extra stroke on this one and the entry price. Blueprint seems to get a lot of good press, I think you made a great choice.

Are those blueprint heads a version they researched and created? Engine masters series by hot rod magazine on youtube has been mentioning them. They don't have bad things to say about them. I'm not sure if Cuisinartvette still works heads or intakes but I bet if you sent your miniram and heads off this crate to him, he could find some more horsepower to put on the table for you.

Last edited by 1985 Corvette; Apr 6, 2016 at 05:58 PM.
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Old Apr 7, 2016 | 01:20 PM
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Originally Posted by ShadowC4
Hi everyone I just bought a blueprint 427ci crate motor and I was wondering if the TPIS miniram that I had on my 383 would feed the 427 or if I would need to get another intake.

also will 42 lb injectors feed this engine?

here is the engine specs.

http://www.jegs.com/i/Blueprint+Engi...272CT/10002/-1

Thank you for any input you can provide.
Will the straight plug heads work with your headers?
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Old Apr 7, 2016 | 01:36 PM
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Hi ShadowC4.

We saw your post and wanted to thank you for your purchase of BluePrint Engine's 427 small block! Remember, we are here to help if you have any questions on our products.

Some of the other members asked why the 427 was only making 540 hp.

The easiest answer is that BluePrint Engines builds street performance engines. Our crate engines are not built to be race engines. This means that we design our engines for our customer base who want a great, reliable engine that does not require a ton of maintenance. They want engines that they can get in and drive on a Saturday morning without worrying about doing a bunch of work on it the night before.

We build the engines to have great street manners, use hydraulic camshafts, run on 91 octane gasoline, need less than a 3000 rpm stall converter, and have our 30 month/50,000 mile warranty. These builds are designed for great low to midrange power and torque where street driven vehicles can take advantage of it.

It is easier than ever to get a 427 small block over 600 hp with today's cylinder head and camshaft technology. But, building these engine often require solid roller camshafts. These require bronze gears on distributors that need changing every 10,000 miles, need regular valve adjustments, and replacing valve springs and lifters quite regularly for a long life of an street driven engine. These cam profiles often require 3000 + plus stall converters and are can be difficult to drive in traffic.

There also seems to be some confusion about our cylinder heads and blocks. BluePrint Engines has grown to the position that we now employ our own design and engineering staff, who has been designing our own engine products. We are moving from just being a machine shop to a fully realized engine manufacturer. We did this for several reasons. A. better control over inventory and especially quality. B. We are able to design in details we wanted for the engines we are building. C. Reducing cost, which we then pass to the customers! While we do not have our own foundries, we do own the tooling that is being used to make our products.

Scott Liggett
BluePrint Engines
1(800)483-4263
info@blueprintengines.com
www.blueprintengines.com
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Old Apr 7, 2016 | 04:30 PM
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you guys have come a long ways
that is one hell of a warranty
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Old Apr 8, 2016 | 01:16 PM
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Originally Posted by BluePrint Engines
We saw your post and wanted to thank you for your purchase of BluePrint Engine's 427 small block! Remember, we are here to help if you have any questions on our products.
Hi Scott,
I am excited for the 427 and counting down the days until I get to drop it into my Corvette. I am hoping to surprise a few people with it. i do have questions:
what should I set my rev limiter at?
how much timing should I allow?
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Old Apr 8, 2016 | 05:24 PM
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I have a mini-ram on my 427 and it runs great and clean across rpm range. my has a solid roller.
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Old Apr 10, 2016 | 03:53 PM
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Default 427

Originally Posted by ShadowC4
Hi everyone I just bought a blueprint 427ci crate motor and I was wondering if the TPIS miniram that I had on my 383 would feed the 427 or if I would need to get another intake.

also will 42 lb injectors feed this engine?

here is the engine specs.

http://www.jegs.com/i/Blueprint+Engi...272CT/10002/-1

Thank you for any input you can provide.
what year c-4, stock distributor,headers,flywheel,same pulley system,.........thanks
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Old Apr 10, 2016 | 04:13 PM
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Originally Posted by fisheson
what year c-4, stock distributor,headers,flywheel,same pulley system,.........thanks
1988 35th anniversary, headman headers(going to swap these out as the ports don't match), stock distributor with msd coil, stock flywheel and accessories.
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Old Apr 10, 2016 | 07:05 PM
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Default 427

Originally Posted by ShadowC4
1988 35th anniversary, headman headers(going to swap these out as the ports don't match), stock distributor with msd coil, stock flywheel and accessories.
any upgrades to fuel systems also?........thanks
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Old Apr 11, 2016 | 03:39 PM
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Originally Posted by fisheson
any upgrades to fuel systems also?........thanks
It has been a bit but of I remember correctly it has a zr1 fuel pump and the miniram fuel rails with adjustable pressure screw.
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Old Apr 12, 2016 | 06:34 AM
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Originally Posted by 1985 Corvette
Congrats on the crate engine but I'm wondering why a 427 "only" puts out 540 horse at the crank? I'm guessing with the miniram it won't make that torque rating.....maybe hp will bump up? It's more than enough power to get me in trouble but was just curious. For the price, looks like it has some good stuff packed inside it.

540 is alot of HP in a C4. If legit that's around 470 rwhp. Certainly nothing to sneeze at....My 421 was just shy of that and it pulled pretty hard!

What rwhp did your 383 make?
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Old Apr 12, 2016 | 09:11 PM
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Default Mini-Ram Version

Originally Posted by mxnuke
I have a mini-ram on my 427 and it runs great and clean across rpm range. my has a solid roller.
I was curious as to which Mini-Ram version you used the 1204 or 1205 gasket cut port. Thank You, JB
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Old Apr 12, 2016 | 10:27 PM
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Originally Posted by 88BlackZ-51
540 is alot of HP in a C4. If legit that's around 470 rwhp. Certainly nothing to sneeze at....My 421 was just shy of that and it pulled pretty hard!

What rwhp did your 383 make?
No numbers from mine but I'd count myself fortunate if I have 400 at the tire.......but doubtful. After a second look at the overall package of that blueprint, that's a pretty good choice. Would definitely take it!
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