Review my Engine Build Please
Le Mans Master
Joined: Jan 2000
Posts: 8,721
Likes: 108
From: Canada
Have you finalized your build yet? You may have mentioned it but what carb are you going to be running ? Are you going to get it dyno'd once you have put it all together? I am sure that there are quite a few here looking fwd to seeing/hearing the results on your build. 
Last edited by gdh; Jan 3, 2014 at 01:25 PM.
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Finished Not
No, not yet. I just got my AFR 180 heads today, so will be installing them this weekend. Its going to be awhile before I run, as the body off restoration still in work. Unfortunately, I doubt if I ever dyno it, unless I come across a chassis dyno with the finished car. I am content in believing what Billa says, that I should be around 400-420 HP.
Pro
Joined: May 2008
Posts: 582
Likes: 9
You were asking for photos about the headers fit with the AFR heads, did you ever look at the link that I posted? Let me know if you need more photos.
http://forums.corvetteforum.com/c3-g...ld-thread.html
http://forums.corvetteforum.com/c3-g...ld-thread.html
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Mac79
Thanks for the pictures, your doing a fine job on that!
I do notice that the exhaust closest to the steering box turns down quicker coming out of the head, allowing more clearance. I don't believe the Hedman headers do this, so it make me wonder if it runs closer to the steering box. Maybe that is why Hooker did what they did. If anyone runs the Hedmans, I would like to hear from you on this.
Thanks for the pictures, your doing a fine job on that!
I do notice that the exhaust closest to the steering box turns down quicker coming out of the head, allowing more clearance. I don't believe the Hedman headers do this, so it make me wonder if it runs closer to the steering box. Maybe that is why Hooker did what they did. If anyone runs the Hedmans, I would like to hear from you on this.
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
Mac79
Thanks for the pictures, your doing a fine job on that!
I do notice that the exhaust closest to the steering box turns down quicker coming out of the head, allowing more clearance. I don't believe the Hedman headers do this, so it make me wonder if it runs closer to the steering box. Maybe that is why Hooker did what they did. If anyone runs the Hedmans, I would like to hear from you on this.
Thanks for the pictures, your doing a fine job on that!
I do notice that the exhaust closest to the steering box turns down quicker coming out of the head, allowing more clearance. I don't believe the Hedman headers do this, so it make me wonder if it runs closer to the steering box. Maybe that is why Hooker did what they did. If anyone runs the Hedmans, I would like to hear from you on this.
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
Within your list of heads, I'd go with the 65cc AFR heads with 1.43" dual spring pkg for your roller cam. If it were me, I would go with DART Iron Eagle 180cc heads, 65cc chamber, straight plugs. They flow exceptionally well and will compliment your XE270HR roller cam. No need to go DART PRO. Painted, they don't look a lot different from GM castings. Perimeter bolts for valve covers too. I run 1.52 ratio Comp Ultra Pro Magnum rockers with the Comp 1.43" dual spring kit from my K-Kit. I have Hedmann #68301 headers with Jet-Hot coating in/out. 12 years and counting on this set of headers with coating.
I agree with your need to keep the appearance period-correct. I'm not interested in center-bolt valve covers/heads. I like what I grew up with in 1970-85.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
This is what drives me crazy as an amateur in knowing what is correct. Everything I read is that 0.040 is the best quench, and nowhere do I see anything about this being too tight for street and carbon buildup, etc.
Billa, Mako, and all engine experts, please weigh in on this. I could replace the Felprop 1094 0.015 gasket with a Felpro 0.026 gasket, to increase quench up to 0.051.
Billa, Mako, and all engine experts, please weigh in on this. I could replace the Felprop 1094 0.015 gasket with a Felpro 0.026 gasket, to increase quench up to 0.051.
I have rebuilt a bunch of performance motors. One thing I consistently see in higher compression, smaller quench, and modern combustions chambers engines is:
When you pull the heads off the piston tops are nearly carbon free except for the outer edges where the piston is cooler and out of the jet blasts from the quench area.
So the lack of quench and compression causes carbon build up in non-performance motors.
I had headman 1 5/8th on my original 355 ci Once you start exceeding 425 hp it is time to move up to 1 3/4.
Aluminum heads need exhaust ARP studs 3/8th universal kit
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Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
http://purplesagetradingpost.com/sum...fo/heads1.html
Although, for the price of my DARTs, very respectable performance compared to the pricier aluminum AFR's and very impressed to see how DART stacks up to the other 180-195cc (excluding the larger runner) heads in the test... most that cost more too.
I paid $1,100 delivered for my DARTs back around Y2K.
Last edited by TedH; Jan 4, 2014 at 04:22 PM.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
I dont know what cam, heads, headers will work the best here but thats a awesome bottom end to start with and worth some expensive parts. It will be fun to drive and as fast as any new corvette.
All i know now is Colts are making a comeback and within 3 after 28 points behind.
Good football today yeh!
cardo0
All i know now is Colts are making a comeback and within 3 after 28 points behind.
Good football today yeh!
cardo0
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Studs
I installed the AFR heads today, and I must say they are a work of art. I am always a believer in you get what you pay for, and they already have made me feel good, without even turning the starter!
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Do a search on exhaust studs.
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Before this thread fades away, I am thinking a Holley Street Avenger carb for this build, trying to decide between 670 versus 770 cfm AND whether its worth stepping up to the Ultra model???
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Use this. Figure 5500 RPM redline, Street only, remember your intended use, Read and answer the questions carefully. Get the right selection for your use. Smaller carbs that meet your needs also offer better throttle response. A bigger that required carb will get you better high RPM power. http://holley.com/applications/Carbu...bSelection.asp
http://holley.com/applications/Carbu...bSelection.asp
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
You'll be making around 1.2 HP/CID with relatively high VE. Given that, I would tend towards the 670 for strictly a street build. The regular SA is fine for your application.
RPM CFM
1000 96
2000 192
2500 241
3000 289
4000 385
5000 481
6000 577
7000 673
7500 722
8000 770
8500 818
Now...one other item I'd like to take a swing at is your observation that you hadn't planned to go to the dyno. Getting a good dyno tune is one of the best investments you can make and ensures that the engine is delivering what it's capable of. You can certainly do some money runs at the end of the session for bragging rights, but the investment in a good tune is about getting the timing and A/F ratio dialed in across the operating range.
RPM CFM
1000 96
2000 192
2500 241
3000 289
4000 385
5000 481
6000 577
7000 673
7500 722
8000 770
8500 818
Now...one other item I'd like to take a swing at is your observation that you hadn't planned to go to the dyno. Getting a good dyno tune is one of the best investments you can make and ensures that the engine is delivering what it's capable of. You can certainly do some money runs at the end of the session for bragging rights, but the investment in a good tune is about getting the timing and A/F ratio dialed in across the operating range.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Yes dyno it. We need more feedback for the forum here on street builds. Let us know as soon as u get them.
And the 49's have the ball late in the 4th. Greenbay SF tie game. Wooo hoo.
And the 49's have the ball late in the 4th. Greenbay SF tie game. Wooo hoo.
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Dyno
You'll be making around 1.2 HP/CID with relatively high VE. Given that, I would tend towards the 670 for strictly a street build. The regular SA is fine for your application.
RPM CFM
1000 96
2000 192
2500 241
3000 289
4000 385
5000 481
6000 577
7000 673
7500 722
8000 770
8500 818
Now...one other item I'd like to take a swing at is your observation that you hadn't planned to go to the dyno. Getting a good dyno tune is one of the best investments you can make and ensures that the engine is delivering what it's capable of. You can certainly do some money runs at the end of the session for bragging rights, but the investment in a good tune is about getting the timing and A/F ratio dialed in across the operating range.
RPM CFM
1000 96
2000 192
2500 241
3000 289
4000 385
5000 481
6000 577
7000 673
7500 722
8000 770
8500 818
Now...one other item I'd like to take a swing at is your observation that you hadn't planned to go to the dyno. Getting a good dyno tune is one of the best investments you can make and ensures that the engine is delivering what it's capable of. You can certainly do some money runs at the end of the session for bragging rights, but the investment in a good tune is about getting the timing and A/F ratio dialed in across the operating range.