| Author |
Message |
EVfun
Samba Member
Joined: April 01, 2012
Posts: 5474
Location: Seattle
|
 Posted: Sun Apr 18, 2021 3:51 pm Post subject: Re: Large capacity single port |
 |
|
| Lingwendil wrote: |
| I wonder if Performance workshop (Steve/Greg Tims) would be willing to do a Superstock head based on the AA singleport casting? Seems like 37x32 would be an interesting starting point. |
I've been looking for a thread about NEW single port heads. Pictures I've seen at any place selling them seem to show the same head casting. Are all the new single port heads from the same source? Are the new single port heads good quality? How do the ports and combustion chambers compare to stock? Original single port heads are getting pretty old so a quality replacement would be a good option. Long reach plugs for more threads in the alloy would be great, alas I it doesn't look like they get that.
_________________
| Wildthings wrote: |
| As a general rule, cheap parts are the most expensive parts you can buy. |
|
|
| Back to top |
|
 |
earthquake
Samba Member
Joined: January 10, 2008
Posts: 3984
Location: SANDY VALLEY, NEVADA
|
| Posted: Tue Apr 20, 2021 11:35 am Post subject: Re: Large capacity single port |
|
|
OK how about a single port built with
Type 3 heads cut for 90.5/92mm using 90.5's [8.0:1 or so comp ratio]
stock offset turned crank to 72-74mm stroke with Chevy rods [AA I-beam]
Cam ?
1x 40mm DCNF on IR manifold or 2X ICT's [have both]
dog house shroud and cooler
plus all needed to finish build + balancing
This will be for a heavy desert buggy that wont see anything over about 45 mph, do you think it will work? what cam would be best?
eQ
_________________
74 CLASS 11 LOOK-A-LIKE
69 DUNE BUGGY
79 INTERNATIONAL SCOUT II
05 SCION XB SERIES RELEASE 2[#437]
95 Chevy C3500 dually
98 Ford E150
Link to Kelly J. Nolte 3/20/53 - 11/6/08
https://time-zonelabs.blogspot.com/p/about-kelly.html
DEATH TO CHINGERS!
[From a military recruitment poster in the novel "The Stainless Steel Rat" By Harry Harrison] |
|
| Back to top |
|
|
Brian_e
Samba Member
Joined: July 28, 2009
Posts: 3284
Location: Rapid City, SD
|
| Posted: Tue Apr 20, 2021 1:05 pm Post subject: Re: Large capacity single port |
|
|
For the extra money, I would probably just use a good stock crank, but I have a few on the shelf, so that's easy for me to say.
For the cam, I would go with a cb2232. I did a 1680cc SP, cb2239, with a center mount DCNF, and I modified the header for the heat riser. It was OK, but in the end, I think the ICT's would be better and easier. The smaller 1776cc displacement might work out better with the ICT's also.
Just keep the duration on the low side. Like under 238 @ .050". The cb2280 would also work for you. The more low end torque the better for what you are doing.
Brian
_________________
www.type-emotorsports.com |
|
| Back to top |
|
|
Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7212
Location: Videbaek Denmark
|
|
| Back to top |
|
|
Jason37
Samba Member
Joined: April 21, 2004
Posts: 1028
|
| Posted: Tue Apr 20, 2021 2:11 pm Post subject: Re: Large capacity single port |
|
|
| Brian_e wrote: |
For the extra money, I would probably just use a good stock crank, but I have a few on the shelf, so that's easy for me to say.
For the cam, I would go with a cb2232. I did a 1680cc SP, cb2239, with a center mount DCNF, and I modified the header for the heat riser. It was OK, but in the end, I think the ICT's would be better and easier. The smaller 1776cc displacement might work out better with the ICT's also.
Just keep the duration on the low side. Like under 238 @ .050". The cb2280 would also work for you. The more low end torque the better for what you are doing.
Brian |
1680sp, 2232, header, 1.25's on the intake, spin balanced, and ICT's sounds like a great recipe to me!  |
|
| Back to top |
|
|
modok
Samba Member
Joined: October 30, 2009
Posts: 26781
Location: Colorado Springs
|
| Posted: Tue Apr 20, 2021 5:06 pm Post subject: Re: Large capacity single port |
|
|
if you use the single DCNF i would recommend a web 86, i know Alstrup isn't a fan of that one for most things but IMO it is good for this application.
If you opt for dual carbs instead, then I'm not sure, but keep it mild.
By the numbers on the 2232 cam looks good but I ordered one and it was nowhere near the numbers so i sent it back. |
|
| Back to top |
|
|
|
