| Page: |
| Home > 998cc > Pre Build 998 Turbo Build ?'s 7 port head, stock internals | |||||||
 36 Posts Member #: 9909 Member Tyler, Texas |
29th Apr, 2012 at 07:17:54pm
Im about to start purchasing parts for my 998 Turbo build but i have a few questions after searching around and reading up on some stuff. Im trying to get 90% of my parts this summer before i tear it down this fall.
Edited by 408.Luke on 29th Apr, 2012. -1974 Mini 1000 - BRG Turbo Build Soon to come
|
||||||
 8215 Posts Member #: 90 Post Whore Somewhere around Swindon |
29th Apr, 2012 at 10:33:58pm
same head as mine
Crystal Sound Audio said:
Why wolfie...you should have your name as Fuckfaceshithead ! "A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools."-Douglas Adams |
||||||
|
36 Posts Member #: 9909 Member Tyler, Texas |
29th Apr, 2012 at 11:14:02pm
On 29th Apr, 2012 wolfie said:
same head as mine you will have to budget for man sized valves, porting and polishing and fabricating a plenum with injector pockets is a pig and costly the sc head is better value imo even though the core unit is more expensive. you can see by build thread below sadly i have not done anything on it for a while due to other commitments http://www.turbominis.co.uk/forums/index.php?p=vt&tid=363514 That SC head is awesome, but is a 998 bore big enough for its valves? and i wonder if they will ship to the US. As far as the intake (or any fab work for that matter) wont be an issue as long as i can get a hold of all the flanges needed. I help a friend out at his shop who is a fabricator, he built all the suspension for my truck and is an aluminum welding god. Im mainly worried about the engine and trans bits. Im glad i found that fuel rail you used too, thats a awesome deal. -1974 Mini 1000 - BRG Turbo Build Soon to come
|
||||||
 4625 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
30th Apr, 2012 at 06:32:24am
You can get SC to fit the smaller 33-29 valves in their head as they did for Wil/Bens car. |
||||||
 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
30th Apr, 2012 at 07:33:17am
Yep the SC can be fitted with better sized valves and the port size is more suited to the 998 engine. The SC head will need pockets in the block, but nothing else.
Edited by wil_h on 30th Apr, 2012. Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
||||||
 8604 Posts Member #: 573 Formerly Axel Podland |
30th Apr, 2012 at 09:50:26am
Have a read of this:
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
|
||||||
|
114 Posts Member #: 9645 Advanced Member South Wales |
30th Apr, 2012 at 11:43:21am
If the SAAB turbo's were imported into the US you should be able to get hold of a Gt17 easy enough. You should also be able to get a new garret GT1548 in the US, which may be better for a daily drive for the same price as the T3 you posted.
Edited by minivan63 on 30th Apr, 2012. |
||||||
 3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
30th Apr, 2012 at 02:16:04pm
On 30th Apr, 2012 Paul S said:
Have a read of this: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=458167 A 7 port on a 998 is not going to be good as a daily drive. I think the SC will make a nice daily drive, with the right turbo, but the pierce heads might be a different matter. http://www.twin-turbo.co.uk
|
||||||
|
8604 Posts Member #: 573 Formerly Axel Podland |
30th Apr, 2012 at 02:33:34pm
Has anyone actually established the difference between the SC and the Pierce heads or is it just heresay? Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
|
||||||
 10020 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
30th Apr, 2012 at 02:49:02pm
I can tell you 2 differences.
If something is worth doing, it's worth doing half of. |
||||||
|
8604 Posts Member #: 573 Formerly Axel Podland |
30th Apr, 2012 at 02:53:03pm
The issue is more about the port size. Too big and you wont get decent VE off-boost. That is then magnified by the short intake runners. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
|
||||||
|
3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
30th Apr, 2012 at 03:48:32pm
SC can taylor the head to you needs (within limits). He is starting with a lump of metal after all. The pierce heads are a fixed casting so if the ports are too big they can't be made smaller. http://www.twin-turbo.co.uk
|
||||||
|
36 Posts Member #: 9909 Member Tyler, Texas |
30th Apr, 2012 at 03:54:59pm
Id really like to go 7 port partly for looks and partly for ease of tuning, its a tough call though because i dont want it to be a dog down low and i would really like to see over 35mpg's. I could see how long i could get the runner and hope for the best i guess and the fact that you can get smaller valves for the SC head i would think help out with this problem. Also cam selection would come into play. Then turbo size maybe go a little smaller than normal for a quicker spool? I would just run E85 which would help a ton with spooling but my mileage would be horrible -1974 Mini 1000 - BRG Turbo Build Soon to come
|
||||||
|
36 Posts Member #: 9909 Member Tyler, Texas |
30th Apr, 2012 at 03:56:41pm
On 30th Apr, 2012 Ben H said:
SC can taylor the head to you needs (within limits). He is starting with a lump of metal after all. The pierce heads are a fixed casting so if the ports are too big they can't be made smaller. I was wondering the same thing, maybe they could write another program for a smaller cc runner for the 998's. It probably wouldn't be worth their time tho -1974 Mini 1000 - BRG Turbo Build Soon to come
|
||||||
|
1267 Posts Member #: 831 Post Whore Montreal, Canada |
30th Apr, 2012 at 03:57:50pm
On 30th Apr, 2012 Ben H said:
SC can taylor the head to you needs (within limits). He is starting with a lump of metal after all. While they could, do you know that they actually offer this? Customizing like this could be a time consuming process (and expensive). On 30th Apr, 2012 Ben H said:
The pierce heads are a fixed casting so if the ports are too big they can't be made smaller. But are they too big or not? Jean |
||||||
 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
30th Apr, 2012 at 04:52:27pm
the SC ports are a good size... think in terms of similar to the K100 ports,
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
||||||
|
4625 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
30th Apr, 2012 at 05:19:39pm
I've not seen a Pierce head in the flesh, but I've seen Joes Minisport 7 port head. If the ports on the Pierce head are anything like the Minisport head then the SC ports are much smaller. |
||||||
|
9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
30th Apr, 2012 at 05:22:12pm
SC ports are 34mm at the flange.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
||||||
|
12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
30th Apr, 2012 at 05:26:53pm
the minisport head is 40mm and I'm positive the Pierce head is the same, although the runners on the pierce head are about 1/2" shorter.
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
||||||
|
8604 Posts Member #: 573 Formerly Axel Podland |
30th Apr, 2012 at 06:10:17pm
I lost interest when he said he wanted the 7 Port for looks :( I always said the 7 Port was a well marketed fashion accessory :)
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
|
||||||
|
36 Posts Member #: 9909 Member Tyler, Texas |
30th Apr, 2012 at 08:36:05pm
On 30th Apr, 2012 Paul S said:
I lost interest when he said he wanted the 7 Port for looks :( HAHA looks are just a bonus, if it came down to the 7 port not being good for a daily driver i would have no problem running a 5 port. I just see alot of advantages to running a 7 port. From being able to tune each cylinder so you dont have to flood the inner two, a shorter cold side as well. your intake also isnt sitting right over your turbo heat soaking the crap out of it. If feel sure there were a few more advantages that ive thought of that have eluded me right now but if im not certain i can get a SC 7 port to work on a Daily Driver ill order a 5 port. -1974 Mini 1000 - BRG Turbo Build Soon to come
|
||||||
|
9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
30th Apr, 2012 at 08:45:12pm
I know I gaine over 20bhp (same rpm) over the 5-port when I fitted the 7-port. Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
||||||
|
9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
1st May, 2012 at 07:01:23am
Well that makes the pierce head 40% larger, quite a differance then!
On 30th Apr, 2012 Joe C said:
the minisport head is 40mm and I'm positive the Pierce head is the same, although the runners on the pierce head are about 1/2" shorter. the AKM heads used to be 45mm. I reckon the SC head would be great on a 998 too, Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
||||||
|
36 Posts Member #: 9909 Member Tyler, Texas |
1st May, 2012 at 01:10:30pm
On 30th Apr, 2012 wil_h said:
I know I gaine over 20bhp (same rpm) over the 5-port when I fitted the 7-port. On 1st May, 2012 wil_h said:
Well that makes the pierce head 40% larger, quite a differance then! That's a huge gain! And if the SC is 40% smaller than a pierce how does the SC compare to a normal ported head run on a 998? Edited by 408.Luke on 1st May, 2012. -1974 Mini 1000 - BRG Turbo Build Soon to come
|
||||||
|
8604 Posts Member #: 573 Formerly Axel Podland |
1st May, 2012 at 03:39:15pm
On 30th Apr, 2012 wil_h said:
I know I gaine over 20bhp (same rpm) over the 5-port when I fitted the 7-port. Have you been back to the Dyno then Wil ? On 21st Apr, 2011 wil_h said:
Actual figure 178bhp @ 7300 144 lbft @ 6200 This was at 18 psi, the old engine made 153bhp at 15psi, this one made 164 at 15psi. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
|
||||||
| Home > 998cc > Pre Build 998 Turbo Build ?'s 7 port head, stock internals | |||||||
|
|||||||
| Page: |